Focus on it, this is 802 HP ink cartridge. we have to refill it ..so for that what we have to do first of all, use a cello tape to cover this circuit from the external ink.
source
How to refill ink in HP 802 cartridge at home
Focus on it, this is 802 HP ink cartridge. we have to refill it ..so for that what we have to do first of all, use a cello tape to cover this circuit from the external ink.
source