Grammar improvements: Nowadays, the engineers adopt lithium cell which has great advantage over the older one for it can last for 10 years and is much lighter.
The battery is a 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V
The battery is a 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V