I am selling a used, LM canister battery, from a 21 Watt HID. This is from the 20-21 HID model, purchased from Dive Addicts in 2015. Never been fully discharged and kept is good condition. If you are looking for a back-up battery- this is the 2-prong version. Comes with Li-On charger.Shipping to lower 48 CONUS through UPS. Asking $500 obo.