Just wanted to put in my two cents worth. Purchased a Husky high power light (500,000 candlepower) about 8 years ago from the local Home Depot store for around 35.00. It has outlasted all our other rechargeable lights, has been used daily on a consistent basis and has weathered several nights of rain outside, unprotected, still charges up but has lost about 60% of capacity due to discharging it below its recommended level. (Children didn't know when to quit) All lead acid rechargeables seem to suffer damage when discharged below their rated minimum voltage.
I think it was to durable a unit, planned obsolescence was not correctly engineered so may have been removed from production.