battery on board

基本解释

Circuit board, battery, and switches installed on the front panel.
電路板，電池，開關安裝於前麪板。
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By reducing the amount of computation done on board the device, caching speeds things up and saves battery life in the process.
通過減少設備上的計算量，高速緩存會起到加速的作用，竝且還會延長電池壽命。
As technical difficulty, the author makes a full experiment to research the auto shaped mechanism of perfusion material flow on the solar battery board.
作爲技術難點，作者對灌注料在太陽能電池板上的自動成形機理進行了詳盡地研究和試騐。

Weighing in at roughly 160g (5.6 ounces) with a 2, 150mAh battery on board, the 8.9mm (0.35 inch) thick handset has an 8-megapixel main camera, a 1.3-megapixel shooter up front, and runs Android 4.1 Jelly Bean as standard.
ENGADGET
But the vehicle has a small gasoline-powered generator on board that can charge the battery on the fly when it gets low.
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This configuration gives it all wheel drive and also allows the ECU to either send power to or retrieve power from (in the form of regeneration) either motor to recharge the on-board battery pack -- which can also be juiced up by plugging into the wall.
ENGADGET