... life: up to 2000 recycles,8times of lead acid battery, 3times of Ni-MH battery2. ultral-high safety: ... there's no dangerousness even battery is misused.3. light weight: 1/3 of ... lead acid battery, 2/3 of Ni-MH battery.4.small volume: less than half ... of lead acid battery, smaller than Ni-MH battery.5. low self-discharge rate: at state ...