I've had a LithiumPros batt that I had in my GT-R & now my Evo for several years w/ only occasional charging issues--due to non-usage of the cars.
I keep the Evo on a trickle charger now & experience no issues when doing so.
Both cars were/are used for competition, but seeing that my M3 is my daily & occasional HPDE ride, I'm thinking abt a lithium LW batt for it--especially now that prices seem to be coming down...
Thanks to the OP & Forza Alonso!!!
* '11.75 E90/DCT LMB--GOT ONE!
* '06 Mitsu Evo MR SCCA/HPDE Weapon
* '09 Nissan GT-R (Gone)
* '90 ZR-1 (Fast)