One way to know how many mAh your batteries are able to hold a charger that does discharge capacity testing can be used
The Xtar VC2/VC4 cannot do this but the Xtar VC4S is one of several chargers that can perform the capacity test and is easier on your wallet than other ones.
I have this charger. It will say FULL when done, and it will hit 4.2V before displaying FULL. The only detractor with this charger is it is a .5 amp charger only, which is OK if you have time to kill while charging or rotating batteries. The VC2S does .5/1/2 amp charging, and can be used as a power bank.
When does it say “FULL”? Where on the little screen? My batteries are 3.7 v and the charger is still going at 4.2 v.
I am charging unprotected Sofirn 3.7v 3000mah button top 18650’s.
Bad advice since the Sofirn 18650 3000mAh is unprotected. Never discharge an 18650 below 2.5 - 2.75 volts (varies on models) but to be safe people usually say 3 volts. Discharging below this point will damage your batteries and it’s not recommended to recharge them.
batteries that have protection protect from short circuit, over charge, over discharge, over current. Chargers these days will stop at 4.2 volts or close to it so you don’t have to worry about overcharging an unprotected battery
A typical Li-Ion charger uses CC/CV logic, which means in the second part of the charging cycle voltage stays constant while the current keeps dropping. Charging is terminated when the current drops below a certain value while keeping voltage the same.
Now I have a 26650 battery that I’m charging. It’s 5000mah & 3.7v.
So glad I have this Xtar VC2.
So when it’s “full” it should read “full” where the mah is displayed? Every battery should do this??