Current turn-around times at our facility have been averaging 5-7 business days for most smaller orders.

SKU: BA4200

BA4200 EGO® 56V 7.5Ah Lithium Battery Rebuild Service

Shipping calculated at checkout.

Charging Recommendations

1. Always ensure that the battery is not hot and is at room temperature before charging.

2. Once charged, remove the battery from the charger. Do not store the battery on the charger for extended periods of time. Please note that storing a battery in a charger that is not plugged into the wall, can potentially cause the battery to drain back into the charger. This was more common with older chargers and we have also noted it in some newer chargers.

3. It is recommended to not store the battery on the device when not in use. Storing the battery separately removes the possibility of the device slowly draining the battery. 

4. If you have not used the battery for 2-3 months, we would recommend recharging the battery and if possible, use them. This helps maintain their health.

5. Lastly, be sure to store your battery in a dry environment. If possible, avoid temperatures below freezing and above 110F to maximize battery life.


Li-Ion batteries may be regulated for shipment based upon their size. Below are links to the regulations from the three main shipping carriers for shipping lithium batteries. 

USPS will transport batteries that are up to 100Wh per section 349.222 that can be found here.

UPS will transport batteries that are up to, but not including, 300Wh per their information that can be found here. UPS Hazmat Phone: 1-800-554-9964

FedEx will transport batteries that are up to, but not including, 300Wh per their information that can be found here. FedEx Hazmat Phone: 1-800-463-3339

Another reference link can be found here. Page 5 references batteries that are being sent for recycling.

DOT Helpline Phone Number: 202-366-4433

PHMSA Information

Sample labels that are used for Li-Ion battery shipments can be found below.

Label 1

Label 2

Label 3

This is a battery rebuild service!

You must ship YOUR battery to us to be repaired. We DO NOT sell new, used rebuilt, or aftermarket battery packs.


Rebuild Service for an EGO® BA4200 battery pack. For the cost of this service, we will open your battery pack, replace all cells, test, and reassemble. Cases, connectors, and circuit boards are re-used and are not replaced or serviced. The performance of our battery packs is equal to or better than that of a brand new battery from the OEM but at a fraction of the cost. Send your BA4200 battery to us and let us make it work as well as new. Our trained technicians work on EGO® brand batteries each day. We rebuild almost all types of EGO® brand batteries. Don't wait any longer. Send your BA4200 battery pack to us for repair today!

Note: When we are rebuilding your battery, if your circuit board is found to be defective, we will contact you. At that time we will provide you with the option of sending us another battery or we can refund you for the rebuild service. The old cells are removed and recycled prior to circuit board testing and cannot be shipped back to you

This item is over 300Wh and is subject to additional shipping regulations. Please visit this link to view each carriers rules/regulations. 

Orders containing lithium batteries will ship by ground only regardless of the shipping method chosen.

EGO® is a registered trademark. MTO Battery is not affiliated with nor endorsed by EGO®. 


Payment & Security

Payment methods

  • American Express
  • Diners Club
  • Discover
  • Mastercard
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor do we have access to your credit card information.

Customer Reviews

Based on 4 reviews
Sean P.
7.5 Ah EGO Battery Rebuild

MTO Battery went the extra mile rebuilding my battery in less time than they quoted and delivering it with a full charge to boot. I've cycled it three times while mowing and it performs as good as it did when it was new.

Highly recommend MTO Battery for rebuilding batteries.

Robert S.
Like have new batteries again.

Until EGO creates an old battery exchange program, or builds batteries that last longer, MTO is hands down the best alternative to paying full price for a new one, or purchasing poor quality after market ines on Amazon. Great service and communication rebuilding my 5.0Ah and 7.5Ah batteries, They work like new again! Only issue was shipping them via USPS. Definitely use UPS for faster, more reliable shipping next time.

Kyle H.
Great Service

I was really impressed with MTO battery they serviced a
5.0 and a 7.5 ego battery for me and the end result was fantastic. They also helped talk me through mailing the battery when my local ups place was confused shout out to Jason. Also, batteries came with a great pen!

Greg D.

Staff Friendliness: A+
Service Time: A+
Service Quality: A+

The pricing is very fair considering this is an American company and not a cheap Asian assembled product.