(ET) Batteries for ER-36 and the like

[ThompsonG DFO-MPO GC CA]

Hi
All you guys with electric riders A-60, A-90, ER-36 etc. What are you using
for batteries. I need a new set and there are way too many options. 

Geof Thompson

A-60,A-90,C-145x2,ER-36,E-8,E-10x2,E12M,E12,E15x2,E-20x2,E-141X2,(looking
for a nice C-185)