Replacement battery for Apple Watch 4 44mm by TelForceOne, model A2059, capacity 291mAh

TelForceOne replacement battery for Apple Watch 4 44mm (model A2059) is a rechargeable lithium-polymer cell with a rated capacity of 291mAh intended to replace the original internal battery of the smartwatch. Designed specifically for the 44mm Apple Watch Series 4, this battery restores operational runtime and supports the device's normal functions when installed correctly. The component is aimed at repair professionals and experienced DIYers who perform battery replacements to extend device service life.

Advantages

This replacement battery provides a capacity of 291mAh matching the intended specifications for Apple Watch Series 4 44mm, enabling restoration of typical daily runtime. The design is compact and tailored for the watch’s internal compartment, allowing proper fit when used with the correct disassembly and reassembly procedure. Using a dedicated replacement battery helps avoid charging issues related to aged or degraded cells and can improve overall device reliability once installed and calibrated.

Suitable for

• Repair workshops performing Apple Watch Series 4 44mm battery replacements
• Experienced DIY technicians refurbishing a 44mm Apple Watch Series 4
• Owners seeking to restore device runtime and standard smartwatch functionality

Key specifications

• Battery type: lithium-polymer (Li-Po)
• Rated capacity: 291mAh
• Compatible device size: 44mm Apple Watch Series 4 (model A2059)
• Form factor: internal replacement cell designed for smartwatch enclosure
• Function support: timekeeping, notifications, sensors and wireless charging compatibility when correctly installed

How to use

Installation requires disassembling the Apple Watch 4 44mm with appropriate precision tools and following standard battery-replacement procedures for small electronic devices. Power the watch down before beginning, remove the display carefully to avoid damage to the glass and flex cables, detach the old battery connector, and replace it with the TelForceOne battery ensuring secure connections and correct orientation. Reapply any adhesive or seals as required for the model and verify operation by charging and checking basic functions such as screen responsiveness, sensors, and notification delivery.

Usage recommendations

Use only proper ESD-safe tools and follow manufacturer or professional repair guidelines. Do not puncture or deform the cell. After installation, perform a full charge cycle and monitor battery behavior for several charge/discharge cycles to ensure stable operation. If unsure about any step, consult a qualified technician to avoid voiding device integrity or causing damage.