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Battery Extra EX02 12-48-400

Battery Reconditioner, Battery Desulfator, Battery Rejuvenator Restore or Maintain Your Lead Acid Batteries in Top Condition


Battery Extra EX02 12-48-400


For all batteries/packs from 12 to 48 volts up to 1,500 Ah

Main applications: Recovery and maintenance of lead acid batteries found in medium sized solar battery banks, fork lift trucks, standby power back up systems.

For the first time a single unit battery desulfator specifically designed to maintain, recover and keep large battery packs in top condition whilst still maintaining the ability to work on smaller battery packs. Generally battery packs in the 12 to 48 volt range, over 500Ah are found in fork lift trucks, medium size off grid solar systems and power back up systems. Dual power settings allow you to set the Battery Extra EX02 for battery packs up to 500 Ah, or for packs from 500+Ah up to 1,500 Ah. The EX02 Battery desulfator also gives an indication of battery internal resistance.

Off grid solar system battery packs are particularly susceptible to battery sulfation. Lead acid batteries should always be fully charged before use and with solar batteries this not always possible.

How to control sulfate build up.

Over the years many devices have been developed to control or eliminate sulfate build up on lead acid battery plates. It is fair to say that some work and many don't, and those that do have generally been made for single batteries or small battery banks. Now there is 100% solution to the problem for larger battery banks. Fit a Battery Extra EX02 desulfator to your batteries, it will work constantly to dissolve the sulfate build up on both the negative and positive plates.

The Battery Extra EX02 takes the small amount of power it needs from the batteries themselves, creating a wide range of frequency signals coupled with a voltage pulse, and sending them to the battery, these are designed to gradually dissolve the sulfate crystals back into the electrolyte; it lowers the internal resistance of the battery, and raises the specific gravity. This will keep, or return, batteries to their maximum capacity, and it works completely independently from the charger or charge controller.

We are so confident in the quality and ability of the Battery Extra to improve the performance of deep cycle batteries that they offer a 90 day full money back guarantee including the return costs. In effect we are offering a free trial of our product, no ifs or buts, if the Battery Extra EX02 desulfator does not improve the performance of your batteries, we give you your money back. Plus we offer an extended three year warrantee with all Battery Extra desulfator products.

Will it work?

On new or sulphated batteries it WILL work every time. The Battery Extra will not work with batteries that have damaged cells or sealed batteries that have dried out, it is not suitable for UPS batteries that are not cycled (charged discharged) but this is the best bit. We offer a 90 day 100% full refund of your payment if it does not revive your batteries, including the return postage cost. So you have nothing to lose and everything to gain. How well will it work? To be truly effective a desulfator need to combine a high power output with the ability to produce a wide range of frequencies. The Battery Extra desulfator has an external heat sink for cooling. It is 10 times more powerful than the cheap alternatives you will see advertised. If you see a desulfator built with plastic box, it cannot possibly be powerful enough to be effective.

The Battery Extra works by creating a wide range of low voltage frequency signals, that are designed to dissolve the sulfate crystals that builds up on both the negative and the positive plates of a lead acid battery. It is this build up that reduces the batteries capacity. Gently dissolving the sulfate crystals back into the electrolyte over several charge cycles, lowers the internal resistance of the battery, and raises the specific gravity. Ensuring that you keep, or return, your batteries to their maximum capacity. It works during both charge and discharge cycles with no need for a special charger or any external power supply. The Battery Extra will work on all types and brands of lead acid battery, including GEL, AGM, Maintenance Free, Deep Cycle, Sealed and Leisure. Whilst the Battery Extra is successful in recovering all sulfated batteries it will not recover batteries with damaged or dried out cells. In addition to recovering sulfated batteries, by fitting the Battery Extra to your battery or battery bank you could double life of good batteries.


- Quad voltage 12, 24, 36 and 48 volt
- Automatic voltage detection
- Dual power settings 200 and 400 mA
- Battery voltage indicator
- No mains power required
- Works during both charge and discharge cycle
- Aluminium case
- Low voltage cut off
- Short circuit protection built in
- EMC tested to EU standards
- CE compliance tested
- Works on all types of lead acid batteries
- Easy installation via ring connectors.

Noticeable results may be seen after the first use, but in most cases the full benefits of using the Battery Extra will take longer, which is why we offer a 90 day risk free trial. If within 90 days, you are not impressed with the results, we'll refund your money in full - no questions asked. Try the Battery Extra today.


Our prices include free shipping by Royal Mail Priority Air Mail from the United Kingdom to most countries. A few countries were the local postal service has proved unreliable may require shipping by courier at additional costs.

UK orders will be sent by Royal Mail first class post.


"I have been using this (on my solar battery bank) for a few months now, the digital readout is clear and can be seen from across the room. This unit is well made, sturdy, easy to hook up and set up. Bottom line, I have very happy with this desulfator and this company, they are very helpful and if you contact them with questions, they get back to you with answers". Wretha USA

"Your desulfators are working great on my clients' old solar battery banks please quote for 6 more EX02 12-48-400" Jeff Philippines.

"Brilliant and so simple. Well made and has a good heat sink which is important on large battery arrays".

"I have used one on my battery bank which has 2nd hand batteries and it has made a huge difference in there storage capacity." AM

"work well. Great for large banks". Thomas Furse Australia

"Does the job simply and well. Exactly what I needed and sits well with a large battery inside a large box. Came well packaged and was dispatched promptly with great communications and response to messages from supplier. Highly recommended." H UK

"Dan you talked me into it, well you were right, it works. Four weeks and the batteries are like new." Max

"What a great piece of kit. My batteries were bone dry. Filled up with distilled water. Put on charge with your device. Took about ten cycles, then whoop saved all four of my batteries. Awesome pal." Baz, Coventry

"Great product, took a bit of time but recovered my battery pack to 90% capacity"

For more customer comments visit our testimonials page Click here


When you buy a Battery Extra battery desulfator from us you are not just buying a product, you are buying into our technical expertise, and you have the backing of engineers with many years of experience in the design and manufacture of batteries, and advanced battery management systems.

Besides the Battery Extra battery desulfator our technicians have designed and built battery management systems for hand held devices and many different electric vehicles including bikes, cars and motorcycles.

If you have any technical questions about the Battery Extra or just need advice or help with your batteries or battery pack, send us an email batteryextra@btconnect.com or phone. Our contact details are on every page of this website.

battery desulfator battery reconditioner

GBP £115.00

USD $164.00

Euro €139.00

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All orders are shipped from the United Kingdom.

We ship within one working day of your payment being received.

Our prices include free worldwide shipping by Royal Mail priority Air Mail. A few countries are excluded from free shipping; we will contact you if this is the case.

UK orders will be sent by Royal Mail first class post.

We accept payment by all major credit cards or PayPal, via the secure PayPal system. You do not need to have a PayPal account to use this service.

We will also accept, from UK customers only, cheques (these will be cleared before shipping) or postal orders.

All Battery Extra products are offered with a 90 day money back guarantee and we will pay the return postage cost. Return postage refund is limited to the cost of return by the same method as we send. 1st. class postage in the UK and Standard Air Mail post from all other countries
Refunds will be paid within 48 hours of receipt of returned product, and will be refunded by the same method as your original payment.

Note: Depending on your country you may be liable for import duties and taxes.

Videos of the Battery Extra in use, posted by our customers on YouTube

Glen’s batteries were losing capacity, and on inspection he found that the battery plates were sulphated, he tried to recover the situation by running a couple of equalisation charges, this did not help, and he published a video of his problem on YouTube. One of his subscribers suggested he try fitting a Battery Extra. So Glenn decided to give it a try, this is an edited video he posted showing the results of using the Battery Extra on his solar Battery bank for 3 weeks.

To see the full video and Glen’s other videos CLICK HERE

Glenn is not connected in any way to Battery Extra Ltd. except as a customer. For full details on all of the Battery Extra models visit our products page.

This is an edited video posted by Chris, from Australia, showing a Battery Extra EX02 in use on a very large solar battery bank of SLA batteries.

To see the full video and Chris's other videos CLICK HERE

Chris is not connected in any way to Battery Extra Ltd. except as a customer. For full details on all of the Battery Extra models visit our products page.

Want more information before you order?.. Read our user manuals.



Unit M
Lammas Court
Lammas Road
NN17 5EZ
United Kingdom.

+44 20 8743 2267