I found this while searching for more info. on this problem.
Lame, May 5, 2007
By Paula (California, USA) - See all my reviews
I bought this flashlight to replace an eight year-old Surefire. I was always happy with the Surefire, but I was tired of having to buy new NiCd batteries after only about 50 charges (about one year of use for me), having to discharge them fully every time before recharging them, and waiting 12 hours for recharge. Unfortunately Surefire doesn't offer rechargeable lithium batteries. The lithium battery in the Inova was a major selling point for me.
However, Inova has a major problem with its chargers. The first two flashlights I've tried do not charge properly. The seller I bought the flashlight from admitted having lots of problems with the Inova flashlights.
Although I've called Inova three times, I've been unable to reach a technician (they don't even have a toll-free phone number). I did speak to the secretary who answers the phone and even she was aware of the charging problem. I left two messages for the technicians and neither was returned.
Inova claims the batteries recharge in "Under three hours." That is totally false. It takes closer to four hours, and then the charger indicates a malfunction, leaving you unsure of whether the battery fully charged or not. Inova also showes a picture of the T4's beam pattern on their website. The picture shows a nice, smooth pattern. The actual beam pattern has several concentric rings of lightness and darkness, not even close to what the advertisement claims.
My assessment of Inova and this flashlight is that Inova is selling a product they know to be highly prone to failure, falsely advertising it, and providing extremely poor customer service.