Replace the secondary battery on a Samsung Galaxy Z Flip 5 (SM-F731B) with this genuine Samsung service pack cell, part number GH82-31831A (model EB-BF733ABY). This is an original Samsung component supplied brand new — the same part Samsung's authorised repair centres use. The Galaxy Z Flip 5 uses a split dual-battery design to fit power cells around its folding mechanism: a 2620 mAh secondary cell and a 1000 mAh main cell, working together to deliver the device's total capacity.

This listing is the secondary 2620 mAh cell (GH82-31831A). A failing battery shows as rapid drain, unexpected shutdowns, swelling, or failure to hold charge — and in a dual-battery device, either cell can fail independently. Fitting a genuine Samsung replacement restores reliable runtime and safe charging behaviour. Both cells should be inspected during any battery repair, as age and wear typically affect them together.

Common Faults Resolved

• Rapid battery drain or short runtime
• Device shutting down unexpectedly with charge remaining
• Battery not holding charge or charging slowly
• Swollen battery cell (safety hazard — replace immediately)
• Device not powering on due to failed cell
• Battery health degraded after heavy use cycles
• Failed prior repair using a poor-quality aftermarket cell

Key Features

• Genuine Samsung service pack part — the same component Samsung's authorised repair centres use
• Samsung part number GH82-31831A (model EB-BF733ABY) — verified original specification
• 2620 mAh secondary cell matches the factory specification
• Part of the Z Flip 5 dual-battery system — the secondary of two cells
• Brand new condition — unused, genuine Samsung service part
• Safe charging behaviour with the original battery management characteristics
• UK trade dispatch with fast delivery to UK repair shops
• 30-day warranty on this genuine Samsung service pack part

Compatible With

• Samsung Galaxy Z Flip 5 — SM-F731B (International)
• Samsung Galaxy Z Flip 5 — SM-F731B/DS (Dual SIM)
• Samsung Galaxy Z Flip 5 — SM-F731U (USA)
• Samsung Galaxy Z Flip 5 — SM-F731N (Korea)
• Samsung Galaxy Z Flip 5 — SM-F731W (Canada)

Not Compatible With

• Samsung Galaxy Z Flip 5 main battery (1000 mAh) — that is a different part number
• Samsung Galaxy Z Flip 4 (SM-F721B) — previous generation, different cells
• Samsung Galaxy Z Flip 6 (SM-F741B) — successor model, different cells
• Samsung Galaxy Z Fold series — different device line entirely

What's Included

• 1 x Genuine Samsung Galaxy Z Flip 5 secondary battery, 2620 mAh (Samsung GH82-31831A / EB-BF733ABY)

Important Notes

• Genuine Service Pack: brand new genuine Samsung part. Service pack cells are the highest-grade replacement available and match Samsung's original specification and safety characteristics.
• Dual-battery device: the Z Flip 5 has two separate cells — this is the secondary 2620 mAh cell. If the device has battery issues, inspect both cells; the main 1000 mAh cell is sold separately.
• Swollen battery safety: never use heat on or near a swollen battery. Remove a swollen cell carefully without puncturing it, as punctured lithium cells can ignite.
• Disconnect before fitment: disconnect the existing battery and all flex connectors at the mainboard before removal to prevent short circuits.
• Adhesive removal: the battery is secured with adhesive. Use the correct solvent and a plastic tool to release it — avoid metal tools that can puncture the cell. Do not apply heat directly to the cell.
• Folding device caution: the Z Flip 5's hinge and folding display make this a delicate repair. Take care around the hinge mechanism and inner display flex cables.
• Replacement adhesive required: fit fresh battery adhesive to secure the new cell and maintain internal layout.
• Bench-test before sealing: verify charging and battery percentage behaviour before reassembling the device.
• Installation should be carried out by a qualified technician using ESD-safe and battery-safe tools.

For our complete range of compatible components, visit our Samsung Galaxy Z Flip 5 replacement parts category.

This is a genuine Samsung service pack part, supplied brand new and unused. It is intended for use by qualified repair professionals and trade technicians only.