I'm using a Interstate MTP 49/H8
It been in a about a year and half now.
The important thing is to match or better amp hours
generally that means you need 49/H8 form factor.
Some people use Walmart battery's with that same form factor
and there between 110 and 150.
I thought I would go with what I considered a quality or name
Don't use battery back up when changing the battery and get it
registered when you can.
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