After my recent battery woes, due to a little bit of battery neglect on my part as well as it being a Chinese battery, fitted by the dealer when I bought the bike, I bought a new one. I paid decent money for it, so I expect it to last a while. 3 years on the previous Chinese one though wasn't bad really.
Anyway, I want to protect my battery investment this time so I also bought a battery tender, an Opimate3, which arrived today. I've installed the wiring that enables me to basically plug the bike into it when I park the bike up at home. All looks good. I must admit to be slightly paranoid about leaving it on overnight though, throughout the winter.
I'm keen to find out how good the 'battery recovery' mode works, as the tender is apparently able to recover 'dead' batteries, depending on how far gone they are. My dead battery was retaining 11 volts, so should be recoverable as the limit for truely dead is 2 volts. I'll test this with the Chinese battery.
If this works, I may try it on my car battery, as it has been sluggish lately, although I will need to check the Optimate is suitable for bigger, car batteries.