RDSJK Surface Book 13.5" Screen Battery 7.5V 18Wh

This RDSJK replacement is a 7.5V, 18Wh Li-ion screen battery designed specifically to replace the screen-side battery in 13.5" Microsoft Surface Book 1 and Surface Book 2 (13.5") models.

If your Surface Book’s tablet portion no longer holds a reliable charge or the screen-side battery indicator shows reduced capacity, this replacement battery restores mobile runtime without replacing the keyboard battery. It matches OEM form factor and connectors for the listed CR7 and 170x model numbers and comes with basic tools to assist installation. The silver, two-cell pack supplies 2387mAh and works with multiple part numbers, making it a direct swap for many 13.5" Surface Book configurations.

Which Surface Book models and part numbers does this battery work with?

This battery is built for the 13.5" Surface Book screen unit and is compatible with several model and part number variants. It is not designed for the 15" Surface Book or for the keyboard battery.

• Compatible models: Surface Book 1 (1703, 1704, 1705) and Surface Book 2 13.5".
• Recognized CR7 model numbers: CR7-00001, CR7-00002, CR7-00005, CR7-00007.
• Replaces part numbers: G3HTA044H, G3HTA045H, DAK822470K, G3HTA020H.

How long will this replacement battery last and how many recharge cycles can I expect?

The pack is rated for up to about 500 recharge cycles under normal conditions, though the real-world lifespan depends on usage patterns, charging habits, and temperature exposure.

• Rated capacity: 2387mAh / 18Wh at 7.5V.
• Cell count: 2-cell Li-ion configuration for compact fit.
• Typical life: multiple years with moderate daily use; heavy users may see faster decline.

What should I know before installing this screen battery myself?

Installation requires opening the tablet portion of the Surface Book and disconnecting internal cables. Basic tools are included, but proceed carefully and follow anti-static precautions; if you’re not comfortable, seek professional installation.

• Tools included to help remove screws and separate the screen from the hinge and casing.
• Ensure you replace the screen battery only — this product does NOT replace the keyboard battery.
• Power down the device and discharge to a low level before beginning work to reduce risk.

Are there recommended charging practices for first use and ongoing care?

To maximize initial calibration and long-term performance, a few conditioning cycles are suggested when using a new Li-ion pack. Avoid extreme temperatures and deep discharges whenever possible.

• First-use recommendation: discharge to about 5% (not 0%), then charge to about 95% and repeat 3–4 times for calibration.
• Avoid storing the battery fully drained or at full charge for long periods.
• Keep the device and battery away from sustained high heat or humidity.

This replacement battery is 100% new from the manufacturer and supplied as the screen-side battery for supported Surface Book 13.5" models. It is intended for users who need to restore tablet runtime without changing the keyboard pack. The included tools simplify home replacement for those with moderate technical skill, while technicians will find the pack matches OEM dimensions and connector types.

Who is this for: This product is best suited for Surface Book owners with diminishing tablet battery life, technicians performing repairs, or buyers replacing a failed screen battery in the 13.5" Surface Book family. If you need the keyboard battery or own a 15" Surface Book, this item is not appropriate — check your device model and part number before ordering.