Look up "turborix 14.8v 15c" on ebay, will come up with a few different models. Click on 5000mah. 75 amp constant, 125amp burst. 525g

I have 2 of these, work awsome and better price, I've ordered 10 batts off these guys, have had water etc on them and no issues.

Ivan.

They do cost more lately(now 82-83), i had gotten mine for 65bucks a couple months ago, not sure why they had price increase.