I ordered this from fasttech, and tried it on a sanyo 18650 @ 3.61V and the battery got quite hot while it was charging. It says 850-900mA charging current. Also the charger terminates at 4.11V. Fasttech says they will give me a credit because of its premature termination voltage, but about the battery being heated will that damage it, and why is that happening, when i use an intl outdoor 650mA charger it seems to charge fine and gets only slightly warm, even after being drained and charged since the ML-102 charging incident.
Maybe you have new v5
it should be that one, i got it last week, mine are the purple top so thats a bit over 0.5C
That’s the output through USB…
Charging current is 1A max(TP4057 outputs in real live more like 0.8-0.9A without heatsink). Have you charged until LEDs showed finish?
Have you checked different cells, maybe this one is old?
I dont have a miller, but I have some charging modules using the same chip. So one possibilitiy is that the chip heats up and warms the battery…
I have sanyos and others loaded with 2A and they don’t get hot.
so far i have only tested this one battery, but this same battery does not get hot in my other charger which just finished charging on my 650mA charger
i will test another battery in the next few days after i drain another one
P = I * I * R Double the current and you get four times the heat…
Check the amp output of your charger when it’s charging…1a shouldn’t cause any heat in a good cell.
My cells usualy get hot at the end of charging(1A current, charging module with TP4056), if they are drained below 3.0V(Sanyo), 3.1V(LG) or 3.4V(FT/UF/itd). If they have higher voltage, they stay cold/slightly warm
The charger will get hot while charging and the heat will be absorbed by the battery over time…the cell will feel warmest near the end of the cycle.
If you use leads to charge the cell outside of the cradle, the cell will stay cool. During the last phase, if the charger is still outputting at 1A the cell could get hot because excess current has to be dissipated…that’s why intelligent chargers drop the current when topping off over 4v…or should be doing so.
Check your current draw, and try charging the cell with leads and check it out.