A pair of UltraFire TR17670 1800mAh 3.7V batteries and a little DIY.
13-07-2014, 17:26
I have an ESR meter built using a circuit designed by GO, a fellow member of the pro-radio forum. I’m sure some of you use this meter too. I use it all the time, but when it runs on a 9V battery with the display backlight on, it drains batteries pretty quickly, so I decided to order a pair of rechargeable batteries for it. Details after the jump.
