Dear all,
I need some guidance charging this battery, what I don't understand is, can I connect it directly to a 5V input from a USB plug? The PCB under the yellow kepton tape has a DW01A IC which from what I found online is a battery protection IC.
Therefore since the battery already has the protection circuit, I should be able to directly connect it to a 5V input USB correct?
for some further informations, the battery will be used to power an atmega 328p and 8x8 adafruit matrix, which I've tried and even if the battery is 3,7V and not 5V it still work without issues, I'm trying to understand now how to safely charge the battery.
That protects the battery from overdischarge and overcurrent. It does not control charging. A separate charge controller is required for LiPo batteries.
LiPo batteries are dangerous! You have probably heard about fires caused by improperly charging or discharging them.
Ok thanks understood, but overcurrent doesnt mean that it stops when the battery is charged? doesnt the lipo battery draw less current when its charged?
The maximum charge current for that battery is 850mA but for long life you should have a charger that can set the current to about 170mA.
1000mA is way to much.
I have all the same chips used in various chargers but I choose to buy a special charger for all my cylindrical batters, another for the big LiPO used for RC equipment and a smaller version for the 2 to 6 cell LiPOs that require balancing. I made that decision after seeing a Lipo explode and the resulting fire. A 3.7V battery being charged with 5V doesn't sound right to me. Good luck.
