Board Thread:Questions and Answers/@comment-98.82.97.187-20130201021056/@comment-220.239.220.183-20150106120959

Heres an easy pain free way. buy the elite battery upgrade, crank it to full, then keep assembling and disassembling the advanced battery. when u buy a battery u get its power and it doesnt go away if u dismantle and still have a big enough energy suply to hold it (such as the elite battery mentioned earlier). just repeat the steps until power is full. I used this cos batbox, mfsu and others didnt work for some reason. But I really like it cos its free energy! Who doesnt want that? anyway hope this works for you!

Note: I used this for 1.7.10 minecraft so it may not work on other versions but give it a try. ;D