How do I know if my battery is charged ? I have a efest imr 18650 2100mah 3.7v 30amp battery, on my multimeter it is giving out 3.9volts, what voltage should I charge this battery too? And what voltage should I go down to before charging?
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When is my battery fully charged?
- Thread starter samooo1994
- Start date
technically you can discharge to 2.5v but that is really pushing it. most people stay above 3v, i even do 3.2v.
max charge = 4.2v or close to it. good battery chargers have overcharge protection but thats the highest voltage
^What he said
if your battery is right around 4.2v, it's fully charged. As far as discharging, the majority of battery spec sheets will tell you not to discharge below 3.5v, while a few can handle as low as 3v before putting them on a charger. As a rule of thumb, I'd say to stick to 3.5v as a minimum, unless the spec sheet specifies something else.
Also, a little personal advice- Pick up a Nitecore D series charger. I have a D2 and a D4, and have no desire to get anything else. Probably the best charger for both reliability, reputation, and quality. Also, they're about the same price as most other digital chargers... so no reason to get something cheaper, unless you can't afford it.
Also, a little personal advice- Pick up a Nitecore D series charger. I have a D2 and a D4, and have no desire to get anything else. Probably the best charger for both reliability, reputation, and quality. Also, they're about the same price as most other digital chargers... so no reason to get something cheaper, unless you can't afford it.
