degwees replied to Slistack's topic in Guides and TutorialsThere is an alternative way to upgrade your H2100 battery! Bumping an old thread because I decided to change the battery on my old H2100 headset. One can buy a HZSL103450A or BS140550 1700mah battery to replace the original 680/700mah unit. This unit has similar dimensions, although thicker at 10mm. It seems to have the right connector and shouldn't require any soldering work. The HZSL103450A has half the charge of a high-end Nitecore 18650 3400mah at the same price, but should be easier to install.