Samsung Galaxy A37 Battery & Charging Port Replacement – Complete UK Guide

Two of the most common faults on any Samsung Galaxy A37 are battery degradation and charging port failure. Both can make your phone practically unusable — a battery that dies by midday or a USB port that only charges when you hold the cable at a precise angle are equally frustrating. The good news is that both are repairable, and this guide covers everything you need to know to diagnose the fault and fix it yourself or arrange a professional repair in the UK.

Get Samsung Galaxy A37 batteries, charging ports, and all related parts at Supreme Phone Parts – Samsung A Series.

Samsung Galaxy A37 Battery – Complete Guide

Understanding Lithium-Ion Battery Degradation

Every Samsung Galaxy A37 battery is a lithium-ion (Li-ion) cell. Li-ion batteries are excellent at storing energy in a compact, lightweight form — but they degrade with every charge cycle. A charge cycle is one full discharge from 100% to 0% (or the equivalent across multiple partial charges). After approximately 300–500 full cycles, most Li-ion batteries retain only 70–80% of their original capacity.

For a phone that's charged once per day, that means noticeable battery degradation begins within 1–1.5 years of regular use. After two years, many A37 users find their battery life has dropped significantly — a phone that once lasted a full day now needs charging by early afternoon.

Signs Your Samsung Galaxy A37 Battery Needs Replacing

• Rapid discharge: Battery dropping from 50% to 5% within minutes during normal use
• Unexpected shutdowns: Phone switching off at 10–20% battery remaining
• Overnight drain: Significant battery loss while phone is idle and not in use
• Slow charge: Taking significantly longer to reach full charge than when new
• Overheating during charge: Phone becoming very warm or hot while charging
• Swollen battery: Back cover lifting or bulging away from the chassis
• Phone only works when plugged in: Battery completely unable to hold charge

Battery Swelling – Act Immediately

A swollen Samsung Galaxy A37 battery is a safety emergency. Lithium-ion batteries can swell when the electrolyte inside begins to break down and release gas. A swollen battery is at risk of rupturing, leaking, or in rare cases catching fire. If your A37 back cover is lifting or the phone feels thicker than usual:

• Do not charge the phone
• Do not press or puncture the battery
• Keep the phone away from flammable materials
• Take it to a professional repair shop as soon as possible
• Do not dispose of a swollen battery in household waste — take it to a battery recycling point

How to Check Battery Health on Samsung Galaxy A37

Samsung doesn't include a native battery health percentage in the standard settings menu (unlike Apple). However, you can check your A37's battery status using:

• Samsung Members app: Go to Get Help → Interactive Checks → Battery to run a battery diagnostics check
• Dial pad code: Enter *#0228# for battery status information
• Third-party apps: AccuBattery or Battery Guru provide detailed battery health estimates

DIY Battery Replacement – Step by Step

Tools Required

• Heat gun or iOpener pad
• Suction cup
• Plastic pry tools / spudgers
• Phillips #00 screwdriver
• Isopropyl alcohol (90%+) and cotton buds
• New A37 battery with correct mAh rating

Step 1: Power Down

Power off the Samsung Galaxy A37 completely before starting.

Step 2: Heat and Remove Back Cover

Apply heat around the back cover edges for 1–2 minutes to soften the adhesive. Use the suction cup to lift and plastic pry tools to work around the perimeter. The back cover should release with moderate effort.

Step 3: Remove Internal Screws

Once the back cover is removed, use the Phillips screwdriver to remove all internal screws securing the midframe and battery bracket.

Step 4: Disconnect Battery Connector

Locate the battery connector on the motherboard. Use a plastic spudger to gently lever the connector upward — it unclips straight up. Do not use metal tools near the motherboard.

Step 5: Remove Old Battery

The battery is held in place with adhesive pull tabs. Pull the tabs slowly at a low angle (parallel to the battery surface) to peel the adhesive away. If the tabs break, apply a small amount of isopropyl alcohol under the battery edges to dissolve the remaining adhesive before levering gently with a plastic tool.

Step 6: Install New Battery

Place the new battery in position and press the connector firmly into the motherboard socket. Reconnect and test before resealing the back cover.

Samsung Galaxy A37 Battery Replacement Cost (UK)

Option	Cost Range
DIY – Part only	£10–£25
Professional repair (part + labour)	£30–£55

When buying a replacement battery, always check the mAh (milliamp-hour) rating matches the original A37 battery specification. Avoid batteries listed with significantly higher capacity than the original — they may not fit correctly or may be mislabelled.

Samsung Galaxy A37 Charging Port Replacement

About the A37 Charging Port

The Samsung Galaxy A37 uses a USB-C charging port. USB-C is the current standard for Android smartphones, offering faster charging speeds, data transfer capability, and a reversible connector design. The port is mounted on a small flex PCB inside the phone chassis and connects to the motherboard via a connector or directly soldered pins depending on the A37 variant.

Common Causes of A37 Charging Port Failure

• Physical wear: Thousands of insertions over months and years bend and wear the connector pins
• Lint and debris: Pocket fluff compacted inside the port blocks the connector from seating fully
• Liquid exposure: Water or sweat corroding the port contacts
• Forceful insertion: Inserting the cable at an angle or forcing it in the wrong orientation
• Damaged cable: A frayed or faulty USB-C cable damaging the port pins

Diagnosing an A37 Charging Port Fault

Step 1: Clean the Port First

Before assuming the port is broken, inspect it with a torch. Lint and debris compacted inside the port is extremely common and can completely prevent charging. Use a wooden toothpick or a non-metallic tool to carefully remove any compacted material. A burst of compressed air can help dislodge debris. Do not use metal tools inside the port.

Step 2: Test with Multiple Cables and Adapters

A faulty USB-C cable is often misidentified as a port fault. Try charging with at least two different cables and two different chargers before concluding the port is at fault.

Step 3: Check for Visible Damage

Shine a torch into the port and look for:

• Bent, pushed-in, or missing pins
• Visible corrosion or green/white deposits
• A loose or wobbly port that moves when you insert the cable

Step 4: Test Wireless Charging (if applicable)

If your A37 supports wireless charging and charges successfully via a wireless pad but not via USB-C cable, this confirms the port is the fault rather than the battery or motherboard.

DIY Charging Port Replacement – What to Expect

The Samsung Galaxy A37 charging port assembly is a flex PCB that can be replaced without soldering on most variants. The flex board contains the USB-C port and often includes the microphone and sometimes the headphone jack. Replacement involves:

1. Removing the back cover (heat and pry)
2. Unscrewing the midframe screws
3. Disconnecting the charging port flex connector from the motherboard
4. Removing any screws securing the flex board
5. Installing the new charging port flex
6. Reconnecting and testing

On some A37 board variants, the USB-C port is soldered directly to the charging port PCB and requires soldering for replacement. If you're not confident with soldering, professional repair is recommended for this component.

Samsung Galaxy A37 Charging Port Replacement Cost (UK)

Option	Cost Range
DIY – Part only	£8–£20
Professional repair (part + labour)	£35–£65

Battery vs Charging Port – How to Tell the Difference

Charging problems on the Samsung Galaxy A37 can stem from either the battery or the charging port — or both. Here's how to distinguish between them:

Symptom	Most Likely Cause
Phone charges fine but drains quickly	Battery degradation
Phone won't charge with any cable	Charging port or battery fault
Phone charges with cable held at angle	Charging port (bent pins)
Phone shuts off at 20%+	Battery calibration or degradation
Back cover bulging	Swollen battery — urgent replacement needed
Phone gets very hot while charging	Battery fault
Charges wirelessly but not via USB	Charging port fault
Not recognised by PC via USB	Charging port fault

Extending Battery Life on Your Samsung Galaxy A37

Whether you've just fitted a new battery or are trying to squeeze more life from your existing one, these tips help maximise A37 battery longevity:

• Avoid charging to 100% routinely: Keeping the battery between 20–80% significantly extends lifespan
• Don't let the battery hit 0%: Deep discharges stress lithium-ion cells
• Avoid overnight charging: Use Samsung's built-in charge limit feature if available
• Reduce screen brightness: The display is the largest power draw on most smartphones
• Disable 5G when not needed: 5G radio constantly searching for signal drains battery
• Use battery saver mode: Activate before the battery drops to extend remaining usage
• Keep the phone cool: High temperatures accelerate battery degradation

Frequently Asked Questions – A37 Battery & Charging Port

Q: How long should a Samsung Galaxy A37 battery last?
A: A healthy A37 battery should provide a full day of moderate use on a single charge. Most batteries begin noticeably degrading after 300–500 charge cycles (approximately 1–1.5 years of daily charging).

Q: Can a swollen A37 battery explode?
A: In rare cases, severely swollen or damaged lithium-ion batteries can rupture or ignite. Do not use a phone with a visibly swollen battery. Stop charging it and take it to a professional repair shop immediately.

Q: Is it safe to replace the A37 battery myself?
A: DIY battery replacement is safe when carried out carefully with the right tools. The key risks are puncturing the battery with metal tools and damaging the ZIF connectors on the motherboard. Use plastic tools and take your time.

Q: Why does my A37 only charge when the cable is at a specific angle?
A: This is a classic symptom of a damaged USB-C charging port, usually bent connector pins or worn contacts. Clean the port first, and if that doesn't help, replacement is needed.

Q: Where can I buy a genuine Samsung Galaxy A37 battery in the UK?
A: Browse our range of Samsung A37 compatible batteries and charging port parts at Supreme Phone Parts – Samsung A Series. We offer fast UK delivery and quality-tested components.