this product using solar-powered, built-in battery to use environmentally-friendly batteries, saving energy also played a role in environmental protection.
本产品用太阳能供电,内置蓄电池使用环保电池,既节省了能源又起到了环保作用。
built-in battery holder.
内建的电池座。
runs on a built-in battery - an electrical impulse within the heart initiates each contraction.
由「内置电池」供能 ——心脏内部的电脉沖信号能激活每一次肌肉收缩。
built-in battery gauge.
内建的电池电量。
this unit can be operated by built-in battery providing more than 18 hours of operation between charges for portability or from included 12v dc wall transformer.
内置充电电池充满电后可工作18小时,也可使用一个12v的变压器带动工作。
the wireless one works through uwb and a small receiver. the keyboard has a built-in battery that lasts for about 2 hours.
it can charge all kinds of mobile phones directly under sunshine, it also can charge with discharging from its built-in battery in any places with weak sunshine or without sunshine.