Both the DermapenWorld Battery Charger and DermapenWorld batteries have polarity symbols printed on them.
On the Battery Charger, the polarity symbols are on the inside of the battery bay. The + Positive towards the top of the charger bay and the – Negative towards the bottom.
On the Battery, the polarity symbols are printed on the wrap as large Blue symbols. The + Positive indicates the top side of the battery and the negative indicates the bottom.
When inserting your Battery into the Battery Charger ensure these symbols match up. Your Battery in the charger should look like the below image.
