Originally Posted by christo930

Description says

"Battery Configurations: Powered by a rechargeable 8.4V 4400mAh lithium-ion battery pack (4x 18650 Batteries; Battery overcharge protection)"

I did a search and these batteries generally sell for $10 for a 2200mah at 3.7V (standard lithium-ion chemistry voltage) and there are a LOT of 1 star reviews specifically about the batteries and that there are multiple sellers and you don't know which seller you will be working with. Some reviewers are saying they are getting good customer service, some are getting very bad customer service and another complaint is that they are being shipped from China and take over 1 month to arrive.

Where are they getting the 8.4V from? They are describing it as an 8.4V battery pack, not that the unit is stepping up the voltage.
It looks like they are using 2 sets of 2 cells in parallel and the two sets are then wired in series like "=>=>---8.4V where each - is a cell for a 36.96 watt hour battery. But the normal voltage of a lithium ion cell is 3.6-3.7V. Seems kind of flaky.

From a light perspective, it looks like a great alternative and I especially like the Velcro battery pack holder/strap because theft is a huge issue in Philadelphia and it would be easy to just take it in a store with me (like I do with my GPS)

Has anyone ordered this and had it for a while? I certainly don't want to buy a light who's battery pack will fail in a few months and costs more than the whole package to replace (at $10 a cell + shipping).

Chris