How does the charger deal with the sudden power failure of the charging LiFePO₄ 3.2V battery and then restore the power

Batteries and Chargers Chargers
1

Generally speaking, cylindrical battery chargers on the market can charge LiFePO₄ batteries

Most chargers are compatible with Li ion 4.2V and Ni MH 1.5V batteries

However, chargers generally cannot immediately recognize Li ion 4.2V, Li ion 4.35v and LiFePO₄ 3.6V batteries

Therefore, the battery type should be carefully selected when charging

Suppose the charger is charging the 26650 LiFePO₄ battery and suddenly loses power for various reasons, such as power failure, poor contact, or child touch. Then it is powered again. What will the chargers on the market do with this battery？ Maybe some chargers will automatically charge to 4.20V?

Thanks

2

I am not sure about this for all chargers that support, but a well designed charger should remember the conditions of the last manually selected charging parameter.

As you guessed, many chargers on the market probably don’t do this.

3

When I get a chance, I’ll check my MiBoxer charger — I’m pretty sure it will default to Li-ion 4.2 —— Good point made here for sure

4

High end chargers will consider these details. However, the instructions rarely mention this information,

Need to experiment by yourself

5

Thank you very much for your information, but I need to confirm with you that charging the IFR battery must be manually selected. If it is not selected, it is charged to 4.20V by default

Now the power is cut off and the power supply is restored. Will charger continue to follow the previous procedure?

6

Ok I just verified my MIBoxer C4 smart charger stays with the manual Battery Type setting after a power outage —- I manually set the charger to LifePo4 for 2 cells, then I picked a charge rate of .20 amp —— I unplugged the charger for a few minutes and plugged it back in — the mode stayed at LifePo4, but the charge rate went back to Auto or full output of 1.5 amp

7

Thank you for your information. It’s well designed and protects the battery

8

Yes, but it didn't remember the current rate.

Charging current rate could be troublesome. Not long ago I decided to do some discharge tests on a few PKCell branded AAA 850mA Ni-MH cells. In a hurry, I started charging them at 1A in my Lii-500, and It ended up being a bad decision. For some reason, my Lii-500's slot 2 completely missed cell charging termination, and when I checked the charger a few hours later I noticed the disaster: the cell in slot 2 (number 4) was extremely hot, its wrapper was completely deformed and there were some “glue” remains from the cell in the slot's positive contact. I ended up properly testing the cells in my PC connected EBD-M05 constant current tester with 4-wire battery holder. The result ended up being as expected: all cells but the number 4 one performed admirably; number 4 cell showed noticeably reduced capacity, and a lot higher internal resistance. So, I dumped it into our local battery recycling containers. I also decided to never use again the slot number 2 in my old Lii-500.

9

I’m not really a big fan of these new automatic charge rate chargers in the first place — They tend to charge at too high of amperage than I prefer

But of all my chargers, It’s the only slot charger I have that does LifePo4