Lithium battery characteristics: 1. The life span is twice that of lead-acid batteries, and the weight is lighter 2. No memory effect, rechargeable, longer battery life 3. Safer, more environmentally friendly, free of heavy metals and harmful substances. 4. Internal protection circuit: overload, over discharge, over current, short circuit protection 5. Life cycle: more than 1000 times, good quality! application: Electric vehicles, model airplanes, power tools, battery pack diy, Golf carts, sightseeing vehicles, electric motorcycles, Electric bicycles, electric wheelchairs, etc..syi