The average rider can use a lithium battery for 2-3 years before feeling like it needs to be replaced. This depends on riding conditions, the weight of the rider, amount of use and discharge rate over time. Discharging your lithium battery quickly under high current will lower the battery capacity over time.
The Magnum i6 Battery can be charged up to 1000 charge cycles. If you fully charge your battery every day you will likely only get 2 years out of it. If you don’t charge your battery every day you will get a longer life out of it.