2x3 colors above first shut down
1 single LED for low battery signal
28uA 2.8V LDO up to 5.5V
dual pad for a 10V LDO for 2S lights
capacitors for LDO
2.8uA comparator without reference voltage, significantly reduced standby drain
the reference voltage comes from the 2.8V regulator and a voltage divider
added for each comparator a hysteresis voltage divider, so a larger bleeder like 470 or 1000 Ohms should be possible
If, like me, you have one of the S2+ lights with a black metal switch you can buy the stainless metal switches from Banggood and the light will shine through the clear gasket (barely). So my Tan/Sand colored S2+ has a stainless metal switch I replaced and then added a lighted switch to.
Has anyone else used this FET switch, they seem not to last more than 2 weeks before they stop working… for some reason the coin cell just craps out. ill Raise R1 value to 4-5kohms to slow down the charging current and see what happens.
The charging current should be fine. But maybe the discharge current stresses the cell too much. The maximum continuous discharge current is 0.1mA.
Try increasing R2, by a lot.
I thought about that as well… but the weird thing is that they just die on there own, the light would be sitting unused for a week with a fully charged 18650 in it, than the next thing I know when I try using it is its dead, the coin cell voltage is at 0. anyway I have some more boards on order, ill increase R2 like you said and see how that effects the battery and the FET gate.