[Closed] Garmin Edge 800 - back up battery

this sort of thing http://www.amazon.com/Duracell-Instant-Charger-Includes-Universal/dp/B002FU6KF2

garmin do one based on a powermonkey.

you need a special configuration of usb lead or the garmin goes into charging/data transfer mode. one of the pins that live in normal USBS is not live in the one needed.

normal back up batterys dont work without the special lead.

i just plugged mine in at the last 24 hour race; seemed to deal with it.

I have just bought one of these:

http://www.amazon.co.uk/gp/product/B005VBNW2G/ref=noref?ie=UTF8&psc=1&s=electronics

It only turned up this morning, so haven't used it in anger, but it charges my Garmin 800 while it is turned on.

interesting .

anychance someone can test some of these with an edge 500 then ?

Cheers