E7U21AA parts
E7U21AA Battery
| Capacity | 4400mAh |
| Voltage | 10.8V |
| Max. energy | 47Wh |
| Cell technology | Lithium-ion (li-ion) |
| Color | Black |
| Manufacturer | Sygnosis |
| Warranty | 1 year |
E7U21AA Premium Battery
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| Capacity | 5200mAh |
| Voltage | 10.8V |
| Max. energy | 56Wh |
| Cell technology | Lithium-ion (li-ion) |
| Color | Black |
| Manufacturer | Premium |
| Warranty | 5 year |
E7U21AA Original Battery
| Capacity | 4910mAh |
| Voltage | 10.8V |
| Max. energy | 55Wh |
| Cell technology | Lithium-ion (li-ion) |
| Color | Black |
| Manufacturer | HP |
| Warranty | 1 year |