Hello

Been looking at building a spypoint rechargeable battery pack for my spypoint cameras using lithium-ion batteries, I noticed the factory pack is 3.7v with only to top post on the pack, my question is if someone out there that has one of the factory packs which is a LIT-10 spypoint battery pack could you give me a volt meter reading of the pack please so I’ll know exactly what the volts is coming out? I’m not understanding how the pack is just rated for 3.7V?

Thanks