Denver radio IR-135S

 A few internal shots. Nicely built.

The battery is a single 2000mAh 3.7V cell. 3 wires, the white marked NTC.

The USB consumption in standby/charging battery was ~0.6A. Turning the radio on increased consumption between 0.1 and 0.15A, meaning a battery life of around 9.5 hours.

Rear panel with led, usb & 2x 3.5mm jacks

30/4/24 The original 2Ah battery (from 12/2021, radio bought 8/22) is lasting less than a day. I think it used to be 4-5 days. Replaced it with 2 x 2.9Ah from BAK. 

The protection PCB from the original 1S now runs 2P. Charging current is 0.7A at 5V. Likely to be a 4-5 hour charge now. If the display is powered, it adds 0.05A. Running current adds 0.1A (TBA when charged)

Be sure to let the PCB cool down after soldering else the radio will think it's on fire from the embedded NTC (13k at 18C, W to BL)