I am done with lead acid batteries. Lithium Iron batteries in both bikes. The one in the Tiger 1050 I haven't connected to a battery tender since installing it almost 2 years ago. The OEM Lead Acid battery I had to charge every time before I tried firing the bike up. The Lithium can have less than a 60% charge, and still put out more power than a fully charged Lead Acid battery.

Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety. Benjamin Franklin, US author, diplomat, inventor, physicist, politician, & printer (1706 - 1790)