How do I replace the battery on a Sanyo ECG-HC55S
Answers should be down here!
Anonymous Jan 15, 2021
It's not easy. I've had mine apart, and the soldered on battery is between the main board, and the soldered on display board, so you'd have to de-solder the display board just to get at the soldered on battery. Another approach would be to solder on some wires to a new battery back if you knew the voltage (3.3?). Mine works well enough with the clock always wrong.
My 2 cents. Batteries have to show voltage and the capacity in MAH. This is often hidden under shrink wrap. The battery will be rechargeable, so you can measure the voltage going to it. charge voltage is a little higher, say 3.2 volts on a 3 volt battery.
on Jan 15, 2021