A Genuine Wal-Mart fix for the battery low problem can be purchased at any Wal-Mart you are near.
Schumacher Red Fuel - works great on a motorcycle. About the size of a cell phone, so packs easy. Bingo - fixes battery
problems when on road with no one's help. Also, charges Iphone and tablet. Especially made for us folks who leave our key on! A must have for DCT owners who can not push start their motorcycles.
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I extracted this out of an old thread that's now closed.
Per OCR's advice I bought one of these Red Fuel battery packs a while back and I carry it on the bike. Today I thought I'd test it out, so I disconnected the battery in my car (1.6 liter 4 cylinder engine), with nothing hooked up but this tiny portable battery pack that almost fits in a shirt pocket. I turned the key and the car started right up. It made a believer out of me.
I actually got mine off eBay or Amazon for about $32 (US). I highly recommend carrying one of these in your frunk.