The length and width of a protected cell is bigger
Thank you Jack! Post has been updated.
I’d recommend putting citations to sources behind the statements.
These batteries are “evolving” rapidly and the age, and source, for each belief is important to have on record.
I don’t mean you have to be responsible for pointing to the best source — just point to where you found what you felt reliable information, so people can go from there.
Regarding storage of batteries in a car during summer, there is some disagreement as to the actual risk:
I’d suggest rewording the sentence to read:
“If you are going to store your flashlight in your car in the summer, primary batteries are recommended over Lithium-Ion rechargeable batteries.”
And for some reason, the statement, “Protected batteries are safer than unprotected batteries,” irks me. Just a style issue. I would have phrased it, “Protected batteries are generally safer than unprotected batteries.” That’s because there are so many exceptions where unprotected batteries are as safe or safer than protected batteries. For example, PCB’s have been known to fail in multi-cell applications. Or the most simple example of a high quality unprotected cell versus a low quality protected cell. But I’m getting picky.
All I want to say is: Thanks for putting this thread together! :GRADE:
Edit: Oh wait, as long as we’re allowed to be ‘picky’ here, it should be cell/cells rather than battery/batteries.
Is it normal for liIon cells to get a bit warm whist charging?
I’ve never felt any of mine go above ambient.
And not to be a knob,but what’s the difference? That’s one thing I’ve never seen explained.
Thanks! beautiful thread!
Here is is in Icelandic:
Lithium-jón öryggi rafhlaða 101
Lithium-jón öryggi rafhlaða
hvatning:
Margir af vasaljós rætt / umsögn / modded í Budget Light Forum (BLF) nota litíum-ion rafhlöður. Notkun litíum-jón rafhlöður er að kynna nokkrar áhættu, og krefst meira en Varúðarráðstafanir alkaline rafhlöður. En eins og allir tól, Þegar það er notað á réttan hátt, áhættan er hægt að stjórna og minnka.
Markhópur:
Þessi færsla lýsir Öryggisráðstafanir fyrir notendur gerðu eru að litíum-rafhlöður. Það þýðir ekki að reyna að afla a heill einkatími um rafhlöður litíum-né tæknilegum ástæðum Li-jón hættum. Það er ætlað sem útgangspunkt.
Það verður alltaf einhver ágreiningur um reglur um öryggi. Sumir reglur ritgerð um öryggi kann ekki við Þeir sem voru Lab aðstoðarmenn til Dr. Goodenough (hlekkur er ytri), en vonandi Þeir eru viðeigandi fyrir nýrri notendur. Þú þarft að vera meðvitaðir um þekkingu og reynslu þína.
Lithium-jón hleðslurafhlöðum er óhætt að nota þegar notað á réttan hátt.
Lithium-jón hleðslurafhlöðum getur verið hættulegt Þegar óviðeigandi notuð.Kaupa góða rafhlöður.
Saving nokkrar smáaurarnir á hvað getur verið varasamt rafhlöður er ekki þess virði.
Sumir ódýrari rafhlöður geta verið fölsun eða kunna að endurvinna / endurheimta.
Recycled "Grade C" 18650 batteries from China – 18650 Battery | BATTERY BRO (Link er ytri)
http: //www.theepochtimes.com/n3/1421555-chinas-sloppy-battery-industry-t … (tengill er ytri)
Reyndir notendur gera uppskeru rafhlöður frá rafhlaða bakpoki.
Bíddu þar til þú hefur meiri reynslu af Li-jón áður en þú reynir.
BLF Community Battery Pulls Overview Thread (Laptop packs and Tool Packs)
Rafhlaða umsagnir.
http://budgetlightforum.com/forum/batteries/rechargeable/reviews
http://budgetlightforum.com/forum/batteries/rechargeable
Batteries and chargers (tengill er ytri)
Kaupa gæði hleðslutæki.
Þetta er annar staður að fara ekki ódýr leið.
An undir sig klefi geta vera öruggur í góðu hleðslutæki en ekki klefi er öruggt í fátækum hleðslutæki. (SawMaster)
Lestu umsagnir. Kaupa vörumerki með góðu endurskoðun.
Atriði sem þarf að íhuga:
Overcharge vernd.
Reverse pólun vernd.
Sjálfstæðum rásum svo þú geta ákæra öðruvísi rafhlaða tegundir eða útskrift stigum á Sametime.
Notendaviðmót gerði gefur þér það sem þú vilt. Gaumljós vs LCD skjá.
Hleðslutækið shoulderstand gjald á 4.2V +/- 0.05V, en rafhlaðan getur komið burt á mismunandi spennu.
My charger do not charge LiIon to 4.2V, is it faulty?
Charger umsagnir.
http://budgetlightforum.com/forum/batteries/chargers/reviews
http://budgetlightforum.com/forum/batteries/chargers
Batteries and chargers (tengill er ytri)
Kaupa og nota multi-metra.
Margir eins og stafrænn multi-metra (DMM).
Lærðu að athuga litíum þitt ion rafhlöður spennu.
Measurement on Flashlight (tengill er ytri)
Athugið: Ekki allir sammála þú þarft DMM, en margir mæla með þeim.
Hleðsla / afhleðsla
Rafhlöður má greiða á: 0 * C - 45 * C (32 * F - 113 * F)
Rafhlöður má tæmd á20 * C60 * C (4 F *140 * F)
http: //batteryuniversity.com/learn/article/charging_at_high_and_low_temp … (tengill er ytri).
Ekki overcharge ekki rafhlöður.
Max spenna shoulderstand vera 4.2V.
Aðeins hleðslan 4.1V getur gefið þér fleiri endurhlaða hringrás.
Góð hleðslutæki kemur í veg fyrir yfir hleðslu.
Rafhlaða hleðslutæki heimilt að innheimta +/- 0.05V og enn vera í umburðarlyndi.
My charger do not charge LiIon to 4.2V, is it faulty?
Eftir hleðslu athuga spennu rafhlöðunnar þinnar með DMM þitt eftir stuttan (~ 5 mín) hvíld.
BU-409: Charging Lithium-ion - Battery University (tengill er ytri)
Ekki overdischarge ekki rafhlöður.
Margir kjósa að endurhlaða rafhlöður Þegar þeirra ná 3.5- 3.6V
Rafhlöður eru tæma Þegar þeir Nær 2.7-3.0v. Endurhlaða.
Rafhlöður byrja að þjást skemmdir ef losað í 2,5 volt.
Rafhlöður ætti að farga Ef þeir liggja að 2,0 volt.
Ekki hlaða ekki rafhlöður Þegar hitastigið er undir frostmarki. (0 * C / 32 * F)
Ekki láta rafhlöður fá of heitt.
Ef þú ert að fara að geyma vasaljós í bílnum í sumar, eru fyrst og fremst rafhlöður mælt yfir litíum-jón hleðslurafhlöðum.
Hátt hitastig draga frumur hraðar, en svo lengi sem afleysingamanneskja er minna en 60 * C (140 * F) það er sennilega ekki öryggi tölublað.
Overblown Concerns Over Li-ion Batteries Stored in Cars
http: //batteryuniversity.com/learn/article/charging_at_high_and_low_temp … (tengill er ytri).
Fyrir langtíma geymslu (mánuðir) það er best að geyma að minnsta 40-50% getu. (3.77-3.87V)
http://batteryuniversity.com/learn/article/how_to_store_batteries (tengill er ytri)
Þegar það er ekki í vasaljós, rafhlöður shoulderstand alltaf vera í hlífðar burðarefni.
Þetta ver frá shorting og líkamlegum skaða.
Aldrei bera lausa rafhlöður í vasa eða tösku.
https://www.youtube.com/watch?v=k1LjSuq0rk8 (hlekkur er ytri) <==
Ekki nota rafgeyma með líkamlegum skaða.
Vernduð rafhlöður eru gen fylkja öruggari en varnarlausa rafhlöður.
Vernduð rafhlöður hafa hringrás innbyggður í sem ver frá yfir-hleðslu og yfir-sinnt.
Verndun hringrás auka lengd og breidd á rafhlöðunni örlítið. Vernduð rafhlöður mun ekki passa í allar vasaljós. Vita vasaljós.
Sumir vasaljós með lág spenna verndun og mun skera burt á lágu spennu. Vita vasaljós.
Sum hár Draw vasaljós mun ferð verndun hringrás í rafhlöðu verndað og varnarlausa þurfa rafhlöður. Vita vasaljós.
Multi-rafhlaða vasaljós hafa meiri hættu en einn rafhlaða vasaljós.
Ef bara að byrja út að þú vilt kannski að takmarka sjálfur til einn rafhlaða vasaljós.
Þegar þú notar multi-rafhlaða ljós, að draga úr líkum á ójöfnu rennsli milli rafhlöður, það er mikilvægt gerði öllum rafhlöður:
eru þau sömu tegund,
eru þau sömu framleiðslu,
hafa sömu getu (Ah)
eru innheimt á sama spennu.
Þú vilt kannski að merkja rafhlöður svo þú-getur notað sama mengi saman yfirvinnu.
Hlaða rafhlöður í stað þar sem það eru ekki eldfim efni.
Setja hleðslutækið þitt á borðið, ekki á sófanum þínum.
Aldrei láta hlaða rafhlöður eftirlitslaus.
Athugaðu þá reglulega til að ganga úr skugga um að þeir eru ekki að fá heitt. Warm er allt í lagi.
Ath: það eru mismunandi skoðanir um hvernig oft þú þarft að athuga.
http: //www.local10.com/news/local-10-investigates/lithium-ion-battery-bu … (tengill er ytri)
Skemmd rafhlöður geta valdið eldsvoða!“Misnotkun skilyrði:… eins og overcharge, yfir-útskrift og innri skammhlaup getur leitt til rafhlaða hitastig langt umfram framleiðanda einkunnir Á markhitastigið, keðju útvermnum viðbrögð geta verið af stað Viðbrögð leiða til frekari hlýnun, sem í snúa hraðar efnahvörfum lyfjahvörf. Þessi skelfilegar sjálf-hraða niðurbrot Li-jón rafhlaða er kallað varma runaway.2 ”(tengill er ytri)
“Á varma Runaway, Hitastig eins hátt og 900 ° C er hægt að ná, 3 (tengill er ytri) og rafhlaðan getur losað umtalsvert magn af burnable og (ef andað í háum styrk) eitrað gas.4” (tengill er ytri)
Royal Society of Chemistry http://pubs.rsc.org/en/content/articlehtml/2013/ra/c3ra45748f\~~HEAD=pobj (tengill er ytri)
Í the atburður af a litíum-jón rafhlaða bruna leita læknis strax.
Burning eða loftun litíum-jón rafhlöður framleiða vetni úr vetni flúoríð fluoride.Symptoms meiðsli eru ekki strax í ljós.
“The rafhlaða getur losað umtalsvert magn af burnable og (ef andað í háum styrk) eitrað gas.4” (tengill er ytri)
Royal Society of Chemistry http://pubs.rsc.org/en/content/articlehtml/2013/ra/c3ra45748f\~~HEAD=pobj (tengill er ytri)
Leitið læknis strax. Ekki bíða þangað til þú finnur fyrir einkennum.
http: //www.candlepowerforums.com/vb/showthread.php 141137 andað-gufur … (tengill er ytri) !!!?
Það eru blönduð skoðanir á með seglum að búa button-boli úr íbúð-toppur rafhlöður.
Ekki fá rafhlöður blautur.
Ekki brenna rafhlöður.
Farga skal rafhlöðum almennilega.
Það er ekki óhætt að borða Lithium-Ion rafhlöður.Nánar lesa um Lithium Ion rafhlöður:
Litany fyrir byrjendur: BLF decision - #47 by 1dash1
Leita staða fyrir “öryggi” - LEDs & Other Stuff - (Reference Guide)
Li-jón Rafhlaða Safety og Shopping Guide - Li-ion Battery Safety and Shopping Guide
Li-jón Safety Áhyggjuefni - Lithium-ion Safety Concerns - Battery University (tengill er ytri)
Lithium undirstaða rafhlöður - BU-204: How do Lithium Batteries Work? - Battery University (tengill er ytri)
Tegundir Lithium Ion - http://batteryuniversity.com/learn/article/types_of_lithium_ion\~~pobj (tengill er ytri)Vinsamlegast láttu mig vita hvað ég hef misst eða hvað ég hef fengið rangt.
Takk!
Rafhlaða tækni breytist ört. Vinsamlegast athugaðu dagsetninguna breyta neðan.
Ég givin ’henni allt sem hún fékk, Captain!
Breytt af: Mr.Scott á 03/07/2016 - 18:46Who else wants to rock Google Translate for a few minutes?
(PS: The layout looks fine in the Editor Window, but not in the Preview. Posting to Know For Sure…)
(PPS: Yep. Looked fine in Google Translate (I translate back & forth to make sure), looked fine (for Icelandic) in the Editor window, looks like crap on Preview and Save. Sorry…)
Précautions concernant les batteries Lithium-ion
Motivation :
La plupart des discussions/tests/modifications sur le forum BudgetLightForum (BLF) concernent des lampes de poche qui utilisent des batteries Lithium-ion rechargeables. L’utilisation de batteries Lithium-ion implique des risques, et requière plus de précautions que les batteries alcalines. Mais comme tout outil, lorsque qu’elles sont utilisées correctement, les risques peuvent être réduits et maîtrisés.Cible :
Ce sujet souligne les précautions de sécurité pour les utilisateurs qui sont novices dans l’utilisation de ces batteries. Il ne s’agit pas d’un tutoriel complet sur les batteries Lithium-ion, ni d’explications techniques du danger de ces batteries. Il s’agit d’un point de départ.
Il y aura toujours des désaccords au sujet des règles de sécurité. Certaines de ces règles peuvent ne pas s’applique à ceux d’entre vous qui ont été assistants de laboratoire pour le “Dr Goodenough”:https://en.wikipedia.org/wiki/John_B.\_Goodenough , mais elle sont pertinentes pour les utilisateurs les plus novices. Vous devez être conscients de votre niveau de connaissance et d’expérience.
Les batteries Lithium-ion rechargeables correctement utilisées peuvent être sûres.
Les batteries Lithium-ion utilisées de façon inadéquate peuvent être dangereuses.
Achetez des batteries de qualité.
Economiser quelques centimes dans ce qui pourrait être des batteries douteuses ne vaut pas le coup.
Certaines batteries moins chères pourraient être contrefaites ou de récupération.
Recycled "Grade C" 18650 batteries from China – 18650 Battery | BATTERY BRO(link is external)
http://www.theepochtimes.com/n3/1421555-chinas-sloppy-battery-industry-t…(link is external)
Les utilisateurs expérimentés récupèrent des batteries dans des packs d’accumulateurs (type PC portable)
Attendez d’avoir un peu plus d’expérience avant d’essayer cela.
BLF Community Battery Pulls Overview Thread (Laptop packs and Tool Packs)
Tests de batteries
http://budgetlightforum.com/forum/batteries/rechargeable/reviews
http://budgetlightforum.com/forum/batteries/rechargeable
Batteries and chargers(link is external)
Achetez un chargeur de qualité.
Un deuxième sujet à ne pas négliger.Une batterie de faible qualité peut être sûre dans un chargeur de bonne qualité mais aucune batterie n’est sûre dans un chargeur de piètre qualité. (SawMaster)
Lisez les essais/tests. Achetez un chargeur de qualité d’une marque reconnue avec de bons avis.
Les points à prendre en considération :
Protection contre la surcharge
Protection contre les inversions de polarité
Des canaux indépendants pour pouvoir charger et décharger des batteries de différents type en même temps.
Une interface utilisateur qui vous indique ce que vous voulez savoir. LED d’indication ou écran LCD.
Le chargeur doit charger à 4,20V /- 0,05V, mais The charger should charge at 4.2V/- 0.05V, but the battery may come off at a different voltage.
My charger do not charge LiIon to 4.2V, is it faulty?
Essais de chargeurs :
http://budgetlightforum.com/forum/batteries/chargers/reviews
http://budgetlightforum.com/forum/batteries/chargers
Batteries and chargers(link is external)
Achetez et utilisez un multimetre .
Beaucoup préfèrent un multimetre à affichage LCD (DMM).
Apprenez à vérifier la tension de vos batteries Lithium-ion.
Measurement on Flashlight(link is external)
Nota : l’utilité d’un multimetre ne fait pas l’unanimité, mais beaucoup de personnes les recommandent.
Charge/décharge
Les batteries peuvent être chargées entre 0*C et 45*C (32*F - 113*F)
Les batteries peuvent être déchargées entre –20*C et 60*C (4*F140*F)
http://batteryuniversity.com/learn/article/charging_at_high_and_low_temp…(link is external).
Ne surchargez pas vos batteries.
La tension maximum doit être 4.2V.
Ne charger que jusqu’à 4.1V allongera la durée de vie de la batterie.
Un bon chargeur de batteries aide à éviter la surcharge.
Les chargeurs de batteries peuvent charger à +/- 0.05V et être dans les tolérances quand même.
My charger do not charge LiIon to 4.2V, is it faulty?
Après la recharge, verifiéz la tension de vos batteries avec votre multimètre après 5min de repos.
BU-409: Charging Lithium-ion - Battery University(link is external)
Ne déchargez pas vos batteries à l’excès
La majorité des gens choisissent de recharger leurs batteries lorsqu’elles atteignent 3,5V à 3,6V
Une batterie est vide lorsqu’elle atteint 3,0V il faut alors la recharger.
Une batterie commence à se dégrader si elle atteint 2,5V.
Une batterie qui a atteint 2,0V doit être recyclé (ne pas l’utiliser).
Ne chargez pas vos batteries si la température estr en dessous de zéro degrés Celcius. (0*C / 32*F)
Ne laissez pas vos batteries devenir trop chaudes.
Si vous voulez stocker des batteries dans votre voiture l’été, choisissez des piles non-rechargeables au Lithium à la place des batteries.
Les hautes températures dégradent les batteries plus vite, mais en dessous de 60°C il n’y a probablement pas de risque.
Overblown Concerns Over Li-ion Batteries Stored in Cars
http://batteryuniversity.com/learn/article/charging_at_high_and_low_temp…(link is external).
Pour le stockage longue durée (plusieurs mois), il est préférable de stocker les batteries à 40-50% de charge (3,77 à 3,87V)
http://batteryuniversity.com/learn/article/how_to_store_batteries(link is external)
Lorsqu’elles ne sont pas dans une lampe de poche, les batteries devraient être stockées dans des boites de protection/transport.
Cela les protège contre les courts-circuits et les chocs.Ne transportez jamais de batteries librement dans votre sac ou vos poches.
https://www.youtube.com/watch?v=k1LjSuq0rk8(link is external) <==
N’utilisez pas une batterie physiquement endommagée.
Les batteries protégées sont en général plus sûre que les batteries nues.
Les batteries protégées sont équipées d’un circuit qui les protège contre la surcharge et la décharge excessive.
Le circuit de protection accroît la longueur de la batterie, et son diamètre. Les batteries protégées ne logent pas dans toutes les lampes de poche. Vérifiez vos lampes, sachez lesquelles sont compatibles.
Certaines lampes de poche ont une protection contre les tensions basses (pour protéger vos batteries). Connaissez vos lampes de poches !
Certaines lampes à fort courant peuvent déclancher le circuit de protection de votre batterie, et nécessitent donc une batterie non protégée. Connaissez vos lampes de =poches !
Les lampes de poches à plusieurs batteries comportent plus de risques que les lampes à une seule batterie.
Si vous débutez juste, il est judicieux de commencer par des modèles à une seule batterie.
Lorsque vous utilisez des lampes à plusieurs batteries, et afin de réduite les risques de décharge inégale entre les batteries, il est important que vos batteries :
soient du même type,
soient de même marque et modèle,
aient la même capacité (mAh),
soient chargées à la même tension,
L’idéal est de marquer vos batteries pour être sûr d’utiliser toujours les mêmes ensemble.
Chargez vos batteries dans un endroit qui ne comporte pas de matière inflammable.
Placez le charger sur un meuble, pas dans votre canapé !
Ne laissez jamais des batteries en charge sans surveillance.
Vérifiez les régulièrement pour être sûr qu’elles ne chauffent pas trop. Tiède, c’est normal, brûlant non !
Nota : il y a différents opinions sur la fréquence de ces vérifications.
http://www.local10.com/news/local-10-investigates/lithium-ion-battery-bu…(link is external)
Une batterie endommagée peut provoquer un incendie !“Des conditions extrèmes tels que la surcharge , une décharge et les courts-circuits internes peuvent conduire à des températures de batterie bien au-delà des caractéristiques du fabricant . À une température critique, une chaîne de réactions exothermiques peut être déclenchée. Ces réactions conduisent à une augmentation supplémentaire de la température, ce qui accélère la cinétique de la réaction. Cette dégradation de l’auto- accélération catastrophique de la batterie Li -ion est appelé emballement thermique
.2”(link is external)
Au cours de l’emballement thermique , des températures jusqu’à 900 ° C peuvent être atteintes, et la batterie peut libérer une quantité importante de combustible et ( en cas d’inhalation dans des concentrations élevées ) des gaz toxiques.
.4”(link is external)
Royal Society of Chemistry Thermal-runaway experiments on consumer Li-ion batteries with metal-oxide and olivin-type cathodes - RSC Advances (RSC Publishing) DOI:10.1039/C3RA45748F(link is external)
Dans le cas d’un incendie impliquant des batteries lithium-ion, consultez un médecin immédiatement.
Brûler ou ouvrir une batterie lithium-ion produit du fluorure d’hydrogène. Les symptômes dûes à l’exposition au fluorure d’hydrogène ne sont pas immédiatement vissibles.
“la batterie peut émettre une quantité non négligeable de gaz inflammable et (inhalé dans de grandes quantités) toxique.4”(link is external)
Royal Society of Chemistry Thermal-runaway experiments on consumer Li-ion batteries with metal-oxide and olivin-type cathodes - RSC Advances (RSC Publishing) DOI:10.1039/C3RA45748F(link is external)
Consultez immédiatement un médecin. N’attendez pas de ressentir des symptômes.
Inhaled vapors from battery!!! | Candle Power Flashlight Forum(link is external)!!!
Il y a différentes opinions concernant l’usage d’aimants pour créer un contact “bouton” sur un contact “plat”.
Ne mouillez pat vos batteries.
Ne brûlez pas de batteries.
Recyclez vos batteries de façon responsable (points de collecte).
Il n’ets pas recommandé de manger des batteries Lithium-ion, en cas de grosse faim, pensez aux piles Alcaline.Plus de lecture sur le sujet :
Une litanie pour débutants : BLF decision - #47 by 1dash1
Faites une recherche de sujet avec le mot-clé “safety” - LEDs & Other Stuff - (Reference Guide)
Précautions d’emploi et guide d’achat des batteries lithium-ion : Li-ion Battery Safety and Shopping Guide
Précautions d’usage Lithium-ion Safety Concerns - Battery University(link is external)
Batteries à base de Lithium BU-204: How do Lithium Batteries Work? - Battery University(link is external)
Types de Lithiuim-ion - http://batteryuniversity.com/learn/article/types_of_lithium_ion
Great info, looks pretty complete and easy to read.
One thing that you may want to expound upon is;
“Don’t over charge your batteries.
Max voltage should be 4.2V”
Maybe explain that most chargers have a tolerance of 1%, so for instance 4.22 volts is not a problem.
Hate to see new members obsess over .02-.04 volts.
Also all voltages should be measured after a short “rest period” and not instantly after coming off charger.
This also does not cover LifePo 3.2 volt or 4.3, 4.35 batteries, but that is another show as they say
Thanks for putting this list together Mr. Scott
Later,
Keith
I’d recommend putting citations to sources behind the statements.
These batteries are “evolving” rapidly and the age, and source, for each belief is important to have on record.
I don’t mean you have to be responsible for pointing to the best source — just point to where you found what you felt reliable information, so people can go from there.
Hank,
Thanks for the comment. References are good. Unfortunately I’ve been copy-and-pasting things into a word file as I came across them and haven’t been saving the references. I will attempt to find as many citations as I can.
Regarding storage of batteries in a car during summer, there is some disagreement as to the actual risk:
Overblown Concerns Over Li-ion Batteries Stored in CarsI’d suggest rewording the sentence to read:
“If you are going to store your flashlight in your car in the summer, primary batteries are recommended over Lithium-Ion rechargeable batteries.”And for some reason, the statement, “Protected batteries are safer than unprotected batteries,” irks me. Just a style issue. I would have phrased it, “Protected batteries are generally safer than unprotected batteries.” That’s because there are so many exceptions where unprotected batteries are as safe or safer than protected batteries. For example, PCB’s have been known to fail in multi-cell applications. Or the most simple example of a high quality unprotected cell versus a low quality protected cell. But I’m getting picky.
Done and done. Thank you! Picky is fine.
> copy-and-pasting thing into a word file
If you still have the original text you copied and pasted, just paste a chunk of it back into a Google search as a quoted string; likely it’ll take you right to where it first appeared.
If not, at least, going forward, it’s easy to capture the source URL as well as the words you want, which will help as this evolved.
This should absolutely be a sticky.
Great info, looks pretty complete and easy to read.
One thing that you may want to expound upon is;
“Don’t over charge your batteries.
Max voltage should be 4.2V”Maybe explain that most chargers have a tolerance of 1%, so for instance 4.22 volts is not a problem.
Hate to see new members obsess over .02-.04 volts.
Also all voltages should be measured after a short “rest period” and not instantly after coming off charger.This also does not cover LifePo 3.2 volt or 4.3, 4.35 batteries, but that is another show as they say
Thanks for putting this list together Mr. Scott
Later,
Keith
What is “short” with respect to “a short rest period”? As a newbie that is one of my first thoughts.
I thought I’d read that tolerances were +/- 0.05v for chargers. Of course I can’t find the citation right now. >:-/
A few minutes should be fine for accurate voltage measuring. Wait until the cells cool down to use them in their respective device.
What is “short” with respect to “a short rest period”? As a newbie that is one of my first thoughts.
I thought I’d read that tolerances were +/- 0.05v for chargers. Of course I can’t find the citation right now. >:-/
You’re right. I was thinking Short being 5 minutes. Sorry I did not include an actual time frame.
1% tolerance in this case would be .042 volts so yes near .05 volts would be a reasonable variance.
Members should also realize that the health and even size of a cell can also effect voltage termination values.
My experience has shown that many times a smaller cell such as a 16340 may end charging at 4.17- 4.18 where as a normal 18650 on the same charger would come off at 4.20-4.22.
So if the user only were to try the 16340 cell they may think there is something wrong with the charger when this is not the case.
As in many things in life you are looking for a suitable safe range and not an absolute value on each and every cell.
I agree with your recommendation that the user chose a good name brand charger and not just an unmarked charger.
Thanks
MR. SCOTT, WELL DONE!!!
Well done, I am in awe that you took the time to do this, and I think that it has the potential to save an unknown number of li-ion battery users a whole deal of time/grief/injury.
I have some thoughts. What I am going to say comes from having worked with many people who are new to the field I work in and trying to be more effectively informative without wasting time or coming across as condescending.
1. Delete the first two paragraphs. You do not need to excuse yourself for trying to save people bodily injury. Acutely, the first paragraph could be a few pictures of people that have suffered such injuries due to the improper care of li-ion cells, although that may come across as offensive or heavy-handed to many. I think a quick explanation of the dangers of li-ion cells followed by a brief explanation of what is contained in the guide would suffice as a more pleasant alternative to that, but getting to the point quickly and concisely, especially in a thread designed on promoting safety, is important.
2. The section on a lithium battery fire is not substantially alarming. It needs to be much more of a noticeable bullet point. I’ve seen several “venting with flame” claims by manufacturers that seem to have the intention of assuring the customer that no real danger is present. The chemicals released during a li-ion fire are bad enough that medical attention is necessary immediately instead of the next day to prevent chronic problems.
I think you did a bang up job on this and I appreciate how much work it is to put something like this together, and I thank you for doing it. Kudos to you Mr. Scott.
All I want to say is: Thanks for putting this thread together! :GRADE:
Edit: Oh wait, as long as we’re allowed to be ‘picky’ here, it should be cell/cells rather than battery/batteries.
Couple of concerns.
This thread is posted in the “Rechargeable Batteries” category not the “Rechargeable Cells” Category.
HKJ only seems to review batteries, not cells.
That is a lot of editing for this post.
Picky, picky, picky. “Cells” and “batteries” are generally understood to be the same thing by the average person, though when being picky there is a difference. In this context I’d say the terms are understandable and interchangeable- remember the audience and address them as they will best understand. When addressing noobs I usually put something like this: batteries (cells).
On the preambles, yes do shorten them. Simply say the guide is aimed toward the novice users and is not meant to cover every aspect of LiIon rechargeables but only to provide a general guide which will allow their safe use.
On chargers add more emphasis to the absolute need for known safe chargers. An under-performing cell can be safe in a good charger but no cell is safe in a poor charger.
On the dangers of cheap cells, add or link to venting with flame vids and pics; be graphic about how serious these dangers can be. Also add something more on not breathing the fumes at all as this is probably the most potentially harmful aspect of most venting episodes.
And I’m looking forward to seeing this get “stickied” and referred to regularly- it deserves no less!
Phil