Hi to all.
My A118 is purchased 11/12/2014 and just recently ceased to keep the date / time when idle for more than 5 days. And earlier and 2 weeks kept.
Disassembled my battery: ZJ 402535P 3.7V 300mAh 201409, 3 pin, 10kOm control pin. 37 * 26 * 5 mm
I received my new battery 042535Z 3.7V and 500mAh type (in fact, the dimensions are one-on-one with the original and the capacity will be 300-400mAh).
For 79 UAH (2.8 $) + 40 UAH delivery (1.42 $).
With a 2 pin controller, although there is a pad for the third wire. I did not remove the adhesive tape on the new one to check the resistance between the minus and the control. Just soldered two wires of a new battery to the region and began tests.
Everything works correctly.
It is necessary to unsolder the third control wire to measure the resistance.
So, yesterday I tested the connection of a new battery with only two wires + -.
The registrar's charge did not issue a charge - the voltage was 3.7x volts and did not grow with time.
When disconnecting the mini usb cable, the battery held for less than a minute and then the device turned off.
Today:
I measured the resistance on the recorder board - within 13.x ohms, it means that the third wire must be connected to something exactly ... And without the third wire, the recorder's board does not charge on the battery.
I opened the insulation of a new battery, measured the resistance on the third contact - the same 10 kOhm as the native battery.
I soldered the third wire, connected the charging and began to monitor the voltage at the terminals of the battery itself.
The voltage began to rise from 3.7x volts to 3.84 volts in 30 minutes, then after another time it rose to 3.95 volts.
The battery is fully charged at 4.12-4.13 volts. At the same time there were all 3 divisions of the battery charge.
When discharging and recording, the battery lasted 21 minutes and turned off correctly.