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Battery Extra EX02 12-120-800

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


Battery Extra EX02 12-120-800


For all large lead acid batteries/packs from 12 to 120 volts up to 3,000 Ah

Main applications: Recovery and maintenance of lead acid batteries generally found in Solar Battery Banks, Standby Batteries and Electric Vehicles

For smaller packs from 12 to 48 volts and up to 1,500 Ah see our lower capacity product EX02 12-48-400.

90-Day trial with a full money back guarantee including the return postage costs.

Works on all types of lead acid battery and will not interfere with any other electronic devices fitted to your system. Sold to more than 50 countries worldwide.

This product really does work. These are few recent customer comments:

"Exactly 2-months since i installed the battery extra desulfator. Looks like the Battery Extra is living to its advertising. Battery imbalance seems fixed and I noticed battery bank is holding its charge better. Battery life is longer and LVD ATS is not being triggered since almost around 2 weeks now. Battery extra worked wonder"

"Your desulfators are working great on my clients' old solar battery banks"
Jeff, Philippines

"I run an off grid workshop, I thought my 2006 battery bank was down but still ok-- ha ha this has shown me how wrong I was, their life without the back-up 24v genny running has nearly doubled, and run time before inverter cuts off has doubled. Superb product, Am totally amazed."
Robin, Scotland

"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 Texas

For more customer comments please visit our testimonials page.

If you have any questions about the Battery Extra or just need advice or help with your batteries or battery pack just send us an e-mail to batteryextra@btconnect.com, call us or use our contact form.

Battery reconditioning, and recovery made easy. More than 70% of Lead Acid batteries fail prematurely due to poor maintenance and sulfation of the battery plates. Now you can save and recover those batteries or just stop it happening.

Engineers at Battery Extra in the United Kingdom spent more than two years developing the Battery Extra EX02 12-120-800 battery desulfator, it is a unique product designed for the maintenance and recovery of large lead acid battery banks generally found in off grid battery banks, high voltage electric vehicles and standby battery applications, whilst retaining the ability to work on smaller low voltage batteries. No other battery reconditioner or maintenance device comes near to the specifications of this item.

This is the very latest design in battery regeneration products, housed in an aluminium corrosion resistant case which is designed to dissipate the heat generated by the recovery process. The Battery Extra creates a much wider range of frequency pulses and at a lower voltage than any other products you will find advertised on the internet. The Battery Extra is not a battery charger; it works in conjunction with your existing charger. It is fully tested and complies with EU safety regulations for EMC emissions, so it cannot affect the operation of any other electronic device fitted to you battery system these test were conducted by ETS in the UK.

Uniquely it will work with battery banks from 12 to 48 volts up to 3,000 Ah, and 60 to 120 volt battery sets up to 1,500 Ah.

For packs from 12 to 48 volts and up to 1,500 Ah see our lower capacity product EX02 12-48-400.

Why do off grid solar batteries suffer from life shortening sulfation

Off grid solar battery banks are particularly susceptible to battery sulfation. During battery discharge, sulfuric acid is consumed and some lead sulfate can form on the plates. Fully charging the battery will reverse the process. If the battery is not fully charged and remains in a partially discharged condition, this lead sulfate will turn into hard crystals. This process, called “lead sulfation”, causes an increase in the internal resistance of the battery and lowers the specific gravity reducing capacity and results in premature failure. Sulfation from undercharging of the battery bank is the leading cause of battery failure in solar systems.

Normal charging of the battery will convert the sulfate back to active material, if the battery is fully charged before every use. However, a solar battery is often not completely recharged before it is called into action. This can be because the panels are undersized or poor weather conditions. To try to solve this problem many solar battery charge controllers employ an automatic equalization program, in effect a controlled over-charge. Depending on the model this program may be pre-set to operate say once a month, or may be manually set by the user. In either case this is OK if the program runs on a sunny day, when the amount of input energy can fully recharge the battery plus the additional overcharge. Unfortunately this is often not the case.

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 charge controller. This is not a short term improvement; once your batteries have been recovered it will continue to work, substantially extending the life of your batteries by keeping them in top condition.

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.


- Multi voltage 12, 24, 36, 48, 60, 72, 84, 96, 108 and 120 volt

- Automatic voltage detection

- Triple power settings 200, 400 and 800 mA

- Battery voltage indicator

- No mains power required

- Works during both charge and discharge cycle

- Aluminum case

- Settable low voltage cut off

- Internal cooling fan

- 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 few charge discharge cycles, 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.


When you buy a Battery Extra battery desulfator from us you are not just buying a product, you are buying into our technical expertise, 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 a message. You can download the Battery Extra user manual at http://www.recovermybatteries.com/manual-ex02-800.html

battery desulfator battery reconditioner

GBP £149.00

USD $214.00

Euro €179.00

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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. Refund amount will be limited to Standard airmail postage cost.

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