Hi guys,
My friend had a dead battery on his laptop, the laptop didn’t want to charge and show the battery as defective.
I bought a new one for him but it only last a few days, and now it won’t charge at all.
It’s been a few month that both battery are dead, he is now using his computer always plugged.
Is there a way to revive these battery? Is the laptop defective?
Thank you!
David
Just read this on battery university:
Do not boost lithium-based batteries back to life that have dwelled below 1.5V/cell for a week or longer. Copper shunts may have formed inside the cells that can lead to a partial or total electrical short. When recharging, such a cell might become unstable, causing excessive heat or showing other anomalies. The “boost” function by Cadex halts the charge if the voltage does not rise normally.
Should i just throw away these battery?
Is there any chances that the battery still have more then 1.5V?
I don’t have the battery with me at this moment to test the voltage.
Thank you
Can’t you send the new one back as a defect? They usually have some kind of warranty.
Otherwise, you can try to replace the cells inside the pack but it’s generally cheaper (and a lot easier) to buy a new one.
I wonder if the laptop has some issues sending power to the battery pack. Check the contact points on the laptop. Maybe some are broken or covered. I suppose you could check them out with a multimeter too, but I'll admit that I've never tried this.
Don't throw away those battery packs. I'm sure there are some members here that would gladly pay the shipping for you to send it their way, although it gets mighty expensive to ship things across the border.
Try returning those battery packs. If you know someone with an external charger for that battery, that may be worth a shot, but I'd charge it in something like an ammo box.
Yeah, try to get a RMA, if it’s been a few weeks then possibly still under warranty from shipper
If not, get a new one, crack open those bad ones, check each cell, might only be one bad cell and 5 good cells…remember laptop batteries are 6-9 individual 18650 batteries in series/parallel, get one bad one and the intelligence on the battery pack won’t charge all of them for safety reasons
Will packs still allow you to replace the batteries? I thought you needed to reset the circuitry. Not sure…
I had a laptop with a bad motherboard... First, the factory battery wouldn't take a charge. Diagnostics showed a bad battery so had Dell swap under warranty. Laptop worked great under battery power, so we asssumed the issue was resolved. About a week later, the same system wouldn't run from battery power any longer. As it turns out, the charging circuit on the motherboard was bad... System would run great but not charge, so we swapped the motherboard (again, under warranty). That resolved the issue...
Definitely talk to the laptop manufacturer for warranty. I had a battery and a hard drive go bad on an HP several years ago and they replaced them both.
was it a cheap aftermarket?
did the laptop initially charge this pack?
if it did its likely just a dud.if you cannot get it replaced tear it apart and salvage the cells.if you do not use 18650 cells time to get something that does like a srk.
just got a pack from a customer that died after 3 cycles from new.12 essentially new panasonic 3100 added to the pile.controller must have died as cells all at 4.18v and 40mohm per pr.still new!
That’s probably what i’m gonna do.
I have 4 flashlight that use 18650