ZERO 60V 21Ah Battery 

Stock 60V 21Ah 50A discharge Internal battery used on the ZERO 10X 60V system. Can be paired with an external 60V 21Ah or 28Ah external battery.  

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Specifications:

1. 60V 21Ah internal battery LG MJ1 3500mAh or Samsung cells
2. BMS max discharge of 50A
3. 2 charging ports and 2 charging ports per pack
4. Dimension: 31.5cm L x 13.3cm W x 5.7cm H

The "S" notation on the battery sticker indicates samsung cells. 

If your battery is not charging due to low voltage or not having charged in a long time,  you might want to try a few diagnostic steps below before swapping out brand new batteries.

Step 1:

Try waking up the battery by unplugging and plugging in the battery connectors.

Step 2:

Try to use a charger of higher voltage to charge the battery for a short period of time.

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