Warranty & Return Policy

In the unlikely event you are having an issue with one of our batteries we have designed and developed a clear warranty & return policy:

  • 5 Year Free Replacement of any factory defects!

     Warranty Registration

          You do not need to register for a warranty with Monster Marine Lithium Batteries, Inc.. You do need to keep your point of purchase                                documentations should you have issues and need to warranty your battery in the future.

  • For all returns or warranty claims contact info@monstermarinelithium.com

  • 30-day money back guarantee. Returns of undamaged batteries may be issued full refunds less a 5% restocking fee.

  • Free lifetime technical support & free battery analysis.

  • Warranty only applies to original owner (non-transferable).

  • Customer will pay return shipping on returns or warrantied component inspections. Please note some battery returns may require special documentation and packaging, and these instances will encounter extra fees. This is in order to correctly comply with lithium battery shipping regulations. For all return shipping we recommend using a local shipping service such as FedEx or UPS.

     Warranty Exclusions

  • Damage due to improper installation; loose terminal connections, under-sized cabling, reverse polarity connections.

  • Damage due to improper operation or improper maintenance.

  • Product that has been opened, modified or tampered with

  • Tampering or removal of manufacture date codes

  • Product that was used for applications other than which it was designed and intended for by the Manufacturer

  • Product that was under-sized for the application

Lighter, Stronger, Longer!

Monster Marine Lithium Batteries, Inc.