How much does a Samsung Galaxy S21 battery replacement cost?

Independent shops typically charge $45–$75, while an official Samsung repair runs $95–$130. DIY parts cost about $25–$45. These are medium-confidence estimates — confirm with a local quote.

How long will the Samsung Galaxy S21 get software updates?

The Samsung Galaxy S21's software support is expected to have ended around 2025, which weighs against paying for a repair.

Samsung Galaxy S21 battery: repair or replace?

A 2026 cost comparison — independent shop vs. official repair vs. a refurbished replacement.

Independent shop repair	$45–$75
Official (Samsung) repair	$95–$130
DIY parts only	$25–$45
Refurbished replacement	$230
Trade-in of the broken one (battery)	$95

medium-confidence estimates — always confirm with a real quote. Prices last reviewed 2026-09-01.

Replace

Replace your Samsung Galaxy S21

It stopped getting security updates in 2025, so a repair buys you a device that's already end-of-life.

For a Samsung Galaxy S21 in good condition, replacing usually makes more sense — It stopped getting security updates in 2025, so a repair buys you a device that's already end-of-life.

What the numbers say

Repair, typical: $60
Share of device value: 26%
Replace, net of trade-in: $135
Support left: ended

At $60, this repair is 26% of the $230 a replacement Samsung Galaxy S21 costs refurbished — small enough that the money is rarely the deciding factor.

It launched at $799 and goes for about $230 today, so it has already given up 71% of its value. Most of the depreciation is behind it, which works in a repair's favour — there is less left to lose.

Security updates are expected to have ended around 2025. That is the strongest argument against this repair: you would be paying to extend the life of a device that is already end-of-life in software terms.

Buyback services pay an estimated $95 for Samsung Galaxy S21 units with battery damage, so replacing really costs about $135 rather than the full $230 — still $75 more than the repair.

Stepping up to the Samsung Galaxy S23 instead costs about $190 more than replacing like-for-like ($420 refurbished) — often the better use of the money if you were going to replace anyway.

A fresh battery in the Samsung Galaxy S21 is one of the cheapest ways to add years of life, so this repair almost always beats replacing the whole device.

Battery capacity degrades with age; a replacement restores full-day use and is one of the highest-value repairs you can make.

Get the verdict for your exact situation

Factor in your device's condition and whether you'd DIY.

Run the Samsung Galaxy S21 checker →

Software support

updates ended ~2025

No more security updates — repairs won't extend the software lifespan.

Next step

Buy the Samsung Galaxy S21 on Amazon Trade in your broken one

Some buttons above are affiliate links. We may earn a commission — it never changes our verdict.

Frequently asked

How much does a Samsung Galaxy S21 battery replacement cost?: Independent shops typically charge $45–$75, while an official Samsung repair runs $95–$130. DIY parts cost about $25–$45. These are medium-confidence estimates — confirm with a local quote.
Is it worth repairing a Samsung Galaxy S21 with a worn battery?: For a Samsung Galaxy S21 in good condition, replacing usually makes more sense — It stopped getting security updates in 2025, so a repair buys you a device that's already end-of-life.
How long will the Samsung Galaxy S21 get software updates?: The Samsung Galaxy S21's software support is expected to have ended around 2025, which weighs against paying for a repair.