Want to charge lithium battery pack with USB-C

Thread Starter


Joined Oct 21, 2015
I have built a prototype battery pack for my Pentax 645 film camera. From 1985. The most common failure on these cameras is the battery packs / holders. They hold 6AA batteries in series, 9v, at whatever the mAh is for a given battery. I can easily replace the batteries and move on. But I would rather charge a bundle of batteries to 9v. How can I tackle this?

Audioguru again

Joined Oct 21, 2019
Two cell lithium batteries for models are 8.4V when fully charged and are about 7.4V when half-charged. The batteries and chargers of all sizes of mAh are sold inexpensively at local hobby stores.