This is getting weirder - On the BG page for the A10, it has the "suit set" option that includes a "battery stick", which looks like 2 cells in series - you have the battery stick and it measures ~7.2v, which is about 1/2 charged (new cells when shipped are usually at 3.6v or so) if in series (definitely not in parallel), but the specs listed say "3.7v-4.2n", implying single cell or parallel battery stick, which looks right for this driver. I just dunno what's goin on... Wish the OP could help but he seems offline for weeks now.
Stock these lights, to me, are a disappointment. However they are a decent light to mod up. They do have a problem with the poorly designed emitter shelf, as detailed in this thread: https://budgetlightforum.com/t/-/27496, but you may be able to work on that. To me, it could be putting out 50% more lumens. but the beam pattern may not end up looking as nice. Some reflector designs need this type of blocking LED alignment piece to create a good looking hot spot, but it sacrifices total output big time.