Ykick
1 GW
I use thumb throttles but can't stand the style in your photo. You're asking for trouble having battery voltage that close proximity to the throttle wiring IMO.
Wuxing Is the company that manufactures the majority of ebike throttles. There is a very simple version without the battery fuel meter. Edward Lyen sells one. I've also bought a few off eBay. They're not totally waterproof but I don't think you will ever find a throttle that is. In heavy rain you should cover it with a plastic shopping bag or ziploc, etc.
Here's an example - http://www.ebay.com/itm/E-bike-Thumb-Throttle-Speed-Control-Handle-Electric-bicycles-Scooters-Pedelecs-/321210103565?pt=LH_DefaultDomain_0&hash=item4ac99d370d
Wuxing Is the company that manufactures the majority of ebike throttles. There is a very simple version without the battery fuel meter. Edward Lyen sells one. I've also bought a few off eBay. They're not totally waterproof but I don't think you will ever find a throttle that is. In heavy rain you should cover it with a plastic shopping bag or ziploc, etc.
Here's an example - http://www.ebay.com/itm/E-bike-Thumb-Throttle-Speed-Control-Handle-Electric-bicycles-Scooters-Pedelecs-/321210103565?pt=LH_DefaultDomain_0&hash=item4ac99d370d