Laptop Battery Health: How to Check It and When to Replace the Battery (2026)

Oct 18, 2026

Buy More Mall Kenya

A laptop that dies an hour after unplugging, shuts down at 30% or only works on the charger usually has a worn battery, not a broken laptop. You can check the battery’s health in a few minutes and replace it for far less than a new laptop.

Quick answer: On Windows, run powercfg /batteryreport in Command Prompt and compare Full charge capacity with Design capacity; on a Mac, see System Settings → Battery → Battery Health. Plan a replacement when capacity falls below about 70–80%, the laptop shuts down unexpectedly, or the battery swells (replace a swollen battery immediately). Replacement batteries for HP, Lenovo and Dell laptops start from KSh 1,500 on Buy More Mall.

How to Check Battery Health

System	How
Windows	Open Command Prompt, type `powercfg /batteryreport`, open the report it saves and compare Design capacity with Full charge capacity.
macOS	System Settings → Battery → Battery Health (shows Normal or Service Recommended and maximum capacity).
Manufacturer tools	HP, Lenovo and Dell support apps show battery health and run diagnostics.

Wear level = 100% − (Full charge capacity ÷ Design capacity × 100%). A battery at 60% of its design capacity gives roughly 60% of the original runtime.

Signs You Need a New Battery

Runtime is a fraction of what it used to be.
It shuts down suddenly at 20–40%.
It only works when plugged in.
Windows or macOS warns "Consider replacing your battery" or "Service recommended".
Swelling: a lifted touchpad, bulging base or keyboard. Stop using it and replace it.

If it will not charge at all, first rule out the charger: see laptop not charging fixes.

Replacement Batteries on Buy More Mall

HP 840 g5 Battery – price in Kenya — HP 840 g5 Battery
**KSh 2,200**

HP 840 g3 Battery – price in Kenya — HP 840 g3 Battery
**KSh 2,000**

HP 430 g3 Battery – price in Kenya — HP 430 g3 Battery
**KSh 1,500**

Lenovo T480s Battery – price in Kenya — Lenovo T480s Battery
**KSh 3,000**

Lenovo T470s both internal & external Battery – price in Kenya — Lenovo T470s both internal & external Battery
**KSh 2,500**

Dell 5300 Battery – price in Kenya — Dell 5300 Battery
**KSh 3,000**

Dell 5420/6420 Battery – price in Kenya — Dell 5420/6420 Battery
**KSh 2,500**

Dell 5480 Battery – price in Kenya — Dell 5480 Battery
**KSh 2,600**

Some photos are reference images of the product type, used under open licences. Image credits are on each product page.

Battery	Fits	Price
HP 840 g5 Battery	HP EliteBook 840 G5	KSh 2,200
HP 840 g3 Battery	HP EliteBook 840 G3	KSh 2,000
HP 430 g3 Battery	HP ProBook 430 G3	KSh 1,500
HP 250 g4 Battery	HP 250 G4	KSh 1,500
Lenovo T480s Battery	Lenovo ThinkPad T480s	KSh 3,000
Lenovo T470s both internal & external Battery	Lenovo ThinkPad T470s	KSh 2,500
Dell 5300 Battery	Dell Latitude 5300	KSh 3,000
Dell 5420/6420 Battery	Dell Latitude 5420/6420	KSh 2,500
Dell 5480 Battery	Dell Latitude 5480	KSh 2,600

How to Choose the Right Battery

Note the exact laptop model (on the label under the laptop) and the battery part number.
Match the voltage and connector; capacity (Wh) can be equal or higher.
Ask the seller to confirm compatibility before paying.
Internal batteries need careful opening; use a technician if unsure.

Can Battery Health Increase?

Not really: lithium batteries wear with charge cycles and heat. Calibration can correct the percentage display, but it does not restore capacity. Slow the wear by keeping the laptop cool, avoiding long periods at 100% while hot, and using battery-care modes (many HP, Lenovo and Dell laptops can stop charging at 80%).

Worked Example: A Student’s EliteBook

A student’s HP EliteBook 840 G3 lasts 40 minutes off the charger. The battery report shows 31% of design capacity. A replacement battery restores a full day of lectures for a fraction of the price of a new laptop.

Common Mistakes to Avoid

Using a swollen battery.
Buying by brand only, not by exact model and part number.
Blaming the battery when the charger or port is faulty.
Leaving the laptop charging on a bed or sofa (heat).

Not sure which one fits? Send us your details on WhatsApp or through the product page and we will help you choose.

Frequently Asked Questions

How do I check my laptop battery health?

On Windows run powercfg /batteryreport; on Mac see Battery Health in System Settings.

When should I replace my laptop battery?

When capacity drops below about 70–80%, it shuts down unexpectedly, or it swells.

How much is a laptop battery replacement in Kenya?

Batteries for popular HP, Lenovo and Dell models start from KSh 1,500 on Buy More Mall.

Can laptop battery health be restored?

No; calibration only fixes the display. Replacement restores runtime.

Is it safe to use a swollen battery?

No. Stop using it and replace it.

Prices shown are regular prices on Buy More Mall. Many products are currently on offer, so open the product page to see today's price.

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