After owning 3 Braille batteries, including 1 Lithium, you'll be lucky to get 2 years. Hence why they have a 1 year warranty. My Lithium battery lasted 1 year and 3 months. Their products are garbage, stay away, they are just rebranded Deka batteries from the same manufacturer (East Penn Manufacturing). Their specifications are overrated, and the battery test sheets they send with the battery will show it. Just stay away, don't get pulled into their motorsports marketing bullshit.