Battery for Thunderobot 911 Air Master/SQU-1711/1718 & Hasee S7-TA5NB/TA7NB 15.4V 41.4Wh, High Capacity Li-ion, 1-Year Warranty

**Important
Voltage & Compatibility Warning: **
Please verify your original batterys voltage and model number before ordering. This battery is rated at ** 15.4V 41.4W h**. Using an incorrect voltage battery may cause system instability or damage. Check your laptops bottom label or original battery sticker for the exact model number (e. g., SQU-1711, SQU-1718, S7-TA5NB, S7-TA7NB).

**Compatible Laptop Models (Partial List): **
- Thunderobot 911 Air Master
- Thunderobot SQU-1711 / SQU-1718
- Hasee S7-TA5NB
- Hasee S7-TA7NB

**Replacement Battery Model Numbers: **
- SQU-1711
- SQU-1718
- S7-TA5NB
- S7-TA7NB

**Specifications Table: **
| Parameter | Value |
|-----------|-------|
| Voltage | 15.4V |
| Capacity | 41.4W h / 2700mAh (typical) |
| Cell Type | Li-ion (Grade A) |
| Color | Black |
| Connector | 6-pin (OEM standard) |
| Dimensions | 270 x 70 x 5.5 mm (approx. ) |
| Weight | 220g (approx. ) |

**Comparison Table (vs.
Generic Batteries): **
| Feature | Our Battery | Generic Battery |
|---------|-------------|----------------|
| Cell Quality | Grade A, certified | Often Grade B or recycled |
| Voltage Stability | ± 0.1V | ± 0.3V or higher |
| Cycle Life | 500+ cycles | 200-300 cycles |
| Overcharge Protection | Yes (built-in BMS) | No or basic |
| Warranty | 12 months | 3-6 months |

**Installation Tips: **

1. Power off your laptop and disconnect the AC adapter.

2. Remove the bottom panel screws (refer to your laptops service manual).

3. Disconnect the old batterys connector carefully by pulling the tab, not the wires.

4. Insert the new battery, align the connector, and press firmly until it clicks.

5. Reinstall the bottom panel and screws.

6. Charge the battery fully before first use (about 3-4 hours).

**Safety & Quality Assurance: **
- Built-in Battery Management System (BMS) protects against overcharge, over-discharge, short circuit, and overheating.
- CE, FCC, and RoHS certified for safe operation.
- 100% tested before shipping to ensure compatibility and performance.

**Whats in the Box: **
- 1 x Replacement Battery
-
- 1 x Installation Guide (digital copy available upon request)

**Note: ** This is a third-party replacement battery, not an OEM product. However, it is manufactured to meet or exceed original specifications. If you have any questions about compatibility, please contact us with your laptops model number and original battery part number before purchasing.