Samsung Galaxy A57 Battery Replacement Guide – Fix Poor Battery Life (UK 2026)

The Samsung Galaxy A57's large battery is designed to handle a full day of demanding use – social media, photography, video streaming, and gaming. But lithium-ion chemistry degrades with every charge cycle, and the A57's power-hungry Super AMOLED display and multi-camera system accelerate the visible impact of that degradation. This guide covers everything UK A57 owners need to know about battery replacement in 2026: how to diagnose degradation, whether to DIY or use a professional, and what it costs.

Find Samsung Galaxy A57 replacement batteries at Supreme Phone Parts – Samsung A Series.

Why A57 Batteries Degrade Faster Than Average

The A57's Super AMOLED display, multi-camera processing, and fast charging all contribute to faster-than-average cycle accumulation:

• Super AMOLED at high brightness: Peak brightness consumes significant power, accelerating cycles
• Camera AI processing: Computational photography draws heavily from the battery
• Fast charging heat: High-wattage charging generates heat, which is the primary accelerant of lithium-ion degradation
• Gaming: GPU and display load simultaneously depletes charge quickly, increasing cycle frequency

A57 Battery Degradation Timeline

Samsung Galaxy A57 Battery Failure Symptoms

Gradual Degradation

• Phone no longer lasting a full day from a morning charge
• Battery depleting faster during gaming or video than when new
• Screen-on time reduced compared to first year of use
• Camera sessions draining battery more than expected

Advanced Failure

• Sudden percentage drops (50% to 5% in minutes)
• Shutdowns at 10–25% charge remaining
• Phone warm during messaging or standby
• Battery percentage reading as 0% then jumping to 40% when plugged in

Emergency: Swollen Battery

Any back cover deformation, bulging, or screen pushing forward indicates a swollen battery. This is a fire and safety risk. Stop charging immediately, cease use, and take to a professional repair centre.

Checking A57 Battery Health

Use Samsung Members → Support → Phone Diagnostics → Battery Status for Samsung's built-in health check. For a capacity percentage reading, use AccuBattery app over 2–3 charge cycles. Enable Device Care → Battery → Battery Protection in Settings to limit charging to 85% and slow future degradation.

A57 Battery Replacement – Step by Step

Tools Required

• Heat gun or iOpener heat pad
• Plastic pry picks
• Plastic spudger
• Phillips #00 screwdriver
• Replacement A57 battery with adhesive strips

Step 1: Discharge to 25% and Power Off

Run the A57 down to below 25% battery then power off completely before starting the repair.

Step 2: Heat Back Cover

Apply heat around all four back cover edges for 60–90 seconds. The A57 uses perimeter adhesive on the back cover.

Step 3: Remove Back Cover

Insert a plastic pick and work around the perimeter. Take extra care around the camera module area – the camera island creates a specific pry path to avoid.

Step 4: Disconnect and Remove Battery

Remove battery bracket screws. Disconnect the battery connector straight up. Pull adhesive pull-tab strips slowly at a low angle. If strips break, use a plastic card – never metal tools near the cell.

Step 5: Install New Battery

Align new battery in the chassis, press adhesive to secure, reconnect connector, replace bracket and screws, reattach back cover.

Step 6: Full Charge Cycle Calibration

Charge immediately to 100%, run down to below 10%, charge to 100% again. Repeat 2–3 times for accurate calibration of the battery percentage indicator.

A57 Battery Replacement Cost (UK 2026)

Frequently Asked Questions – Samsung Galaxy A57 Battery

Q: How much does Samsung Galaxy A57 battery replacement cost in the UK?
A: DIY battery replacement costs £15–£30 for the part. Professional replacement at a UK repair shop is £38–£65 including parts and labour.

Q: Why does the A57 battery drain so fast with the camera?
A: The A57's camera app runs AI scene recognition, HDR processing, and OIS simultaneously. This is normal but power-intensive. If drain seems extreme (more than 1% per minute during normal photography), battery degradation or a background camera process is likely the cause.

Q: Does Samsung's Battery Protect mode really extend battery life?
A: Yes – limiting maximum charge to 85% significantly reduces the time spent at the highest-stress charge level (95–100%), which is the fastest point for lithium-ion degradation. The modest reduction in daily range is worth the long-term capacity preservation.

Q: How long does A57 battery replacement take?
A: A UK repair shop completes A57 battery replacement in 30–45 minutes. DIY takes 45–75 minutes for a first-time repair.