Cordless Phone Batteries & Landline Phone Battery Packs

subtel® - UK phone battery specialists since 2004

subtel® has been a trusted specialist for all types of batteries across Europe and the UK since 2004, offering the best, highest quality replacement, rechargeable batteries for BT cordless phones, business phones, household telephones and hands-free landline phones for a huge variety of models and brands - for high-quality, reliable house phone battery packs at affordable prices.


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A huge selection of rechargeable phone batteries

subtel® sells a large selection of universal and replacement phone batteries include rechargeable batteries for BT cordless phones, wireless phone batteries, batteries for home phones, telecom batteries, base station batteries and more.

We sell compatible replacement batteries for all leading telephone device types, brands and models, including replacement Panasonic batteries, Siemens batteries, Gigaset batteries, Philips batteries, Motorola batteries, Alcatel batteries and many, many more.

Replace your battery, not your phone

Is your original telecom battery no longer holding its charge? Missing calls because of an old, faulty phone battery? Don’t throw away your device - simply replace the battery.

subtel® will have the correct, compatible replacement cordless phone battery for your home phone, enabling you to save money over the long-term on needlessly buying a new phone and helping to reduce environmental waste by giving your old phone a new life.

Our long-life, replacement cordless phone batteries use modern cell technology, meaning that they can be higher-capacity, more powerful and with a longer lifespan than even the original batteries that came with your device - especially if your device is older and its battery uses older battery cell technology.

This means you will get hours more of talk-time without having to replace your household or business phone.

Certified safety and proven quality

All subtel® and CELLONIC® batteries use the highest-quality cells: E & ROHS certified, Grade A battery cells with short-circuit, overheating and overvoltage protection that have been tested and certified for optimum capacity, reliability and safety – all before installation.

3-Year Manufacturer’s Warranty

Our fast charging, longlife replacement batteries for cordless phones stand for certified safety and high-quality standards. Because of this, we offer a 36-month guarantee on all of our batteries.

How do I change the battery on my cordless phone?

Landline phone batteries and hands-free phone batteries can be easily replaced - and it’s simple to do it yourself.

Many cordless phones take standard rechargeable AAA batteries and replacing the battery is as simple as sliding the back off the phone and replacing the AAA batteries with new ones as you would with any other AAA battery device like a TV remote control.

With other landline phones or BT phones you’d need to purchase a specialised telecom battery pack compatible for your phone.

To remove the old battery and install the replacement, you will probably have to open the device itself using a screwdriver.

When removing the old battery, pay attention to where the wires from the old battery lead into the phone’s circuit board as you’ll have to replicate this when installing the new one. Generally, there will be a red (positive) wire and a black (negative) wire. Ensure you carefully connect the replacement battery wires into the correct positions.

Specific screwdrivers or other tools may be required to open up your cordless phone, and subtel® stocks a huge variety of phone repair tools and accessories. When shopping for a replacement telephone battery with us, we’ll let you know which tools you’ll need for your specific model.

With the varying number of different phone models, if you’re unsure how to change the battery on your specific model, check in your phone’s manual, online resources or even a YouTube video. This way you’ll know exactly what to do.

Which battery is compatible with my landline / cordless phone?

If your landline, business or wireless phone battery isn’t working / holding its charge anymore, it’s probably time to buy a replacement phone battery. But, which one fits your phone?

Thankfully, most cordless phones take two standard 1.2v AAA rechargeable batteries - generally Nickel Metal Hydride (NiMH) batteries - which you can simply take out, replace and recharge in a universal AAA battery charger.

If, however, your house phone has a specific, built-in internal battery, you’ll have to do a bit more investigation to find out which replacement cordless phone battery is right for your phone.

The easiest way is to check the manual and find out the model number and type of your battery. If you no longer have the manual, you could search online to see if the manufacturer has published a copy online. If that fails, you’ll have to open your device and find out for yourself.

Using a few good tools, you should be able to remove the back (or whatever panel) from your cordless phone or landline phone to gain access to the battery. All of the information you’ll need to find a compatible replacement battery should be written on the battery itself.

Things to pay attention to are the model number and alphanumeric serial number (enabling you to buy a 100% compatible replacement), the battery cell technology (many internal phone batteries use rechargeable lithium-ion battery cells), the voltage and mAh energy capacity of the battery and the connectors used to connect it to the circuit board. When finding a replacement, it’s important to ensure these values are matched by any new battery you attempt to fit.

There are many universal replacement phone batteries that have been designed with 100% compatibility for your phone model, so don’t feel you need to buy the exact brand and model which originally came with your phone - especially when universal replacements are often inexpensive alternatives that may actually offer more modern technology and higher performance than your older, original battery type.

A higher mAh capacity, for example, could mean your phone will work for longer between charges.

subtel® sells a wide variety of universal replacement telephone batteries and lists the compatible devices for each one. Pay attention to this list to make sure you’re purchasing the correct replacement battery and you won’t have any problems finding a compatible battery.

Reliable power when you need it

Whether you’re looking for a replacement battery, additional battery, exchange battery, reserve battery or battery backup power bank - choose a brand name you can trust.

subtel®’s CELLONIC® brand of designed-in-Germany battery cells use the best materials and technology to create high-end, heavy-duty, high-capacity, reliable and long-life batteries for all device types.

All batteries are shipped within the UK from the day your purchase is made and come with a 3-year manufacturer’s warranty. If for whatever reason you’re unsatisfied with the quality of our batteries, you can return them within 30 days.