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Old August 20th, 2009, 15:35   #55
Crunchmeister's Avatar
Join Date: Nov 2007
Location: In your bedroom going though your underwear drawer
J battery won't fit the E90. The J battery is a 9.6V made with 2/3A mini cells and designed for the TM P90. Echo 1 have made a small adjustment to the internals of the battery compartment allowing the use of a side-by-side 9.6V mini battery, like the one that comes with it.

However, those aren't typically available. I would recommend going to and build yourself a custom 9.6v 1500 mAh pack using Elite cells. It will cost about the same as a cheapo battery back would, but it's made with the best cells on the market and quality wiring and workmanship.
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