12V 21AH GEL DEEP CYCLE Battery replaces 12V 22AH For Sale

Maintenance battery is manufactured with thick paste gel and advanced valve regulated technology which are no spills, no leaks, and no need to check the water. 

Long Shelf Life:

These gel Valve Regulated Lead Acid (VRLA) batteries can be stored for up to 6 months at 25°C (77°F) and the monthly self-discharge rate is lower than 3%. This spec is 5 times better than flooded batteries.

Extended Service Life:

Premium quality enables a life to go up to 1200-1400 cycles at 50% DoD in 25°C with the highest quality

For the first use of the battery, we recommend a full discharge. Every use following, we would recommend a 50% discharge to extend the life span of the battery. We recommend using the same kind of batteries and a battery balancer when connected in series or in recommend using our 12V 4A charger for our 12V 21 Gel VRLA battery.                                                    charger should I use to charge the battery?

We recommend using a charger that is rated below 20% (max.) of the battery's rated capacity. i.e. 12V 1A (max) charger. 

AGM Batteries

VRLA Chargers

Gel Batteries

Lithium Batteries

Solar Panels

Solar Kits

We accept the following payment methods: PayPal, Visa, Master card, American accept credit card payment for US orders only. 

We do not accept non-US credit cards.

For international orders, we accept orders through 's managed payment service.

IMPORTANT DELIVERY dates include seller's handling time, and will depend on shipping  service selected and receipt of cleared payment. Delivery times may vary, during peak periods.”

If additional postage is due upon receipt, please contact us prior to rejecting the package or payment of the package. We will not be responsible for the cost difference if payment is made prior to contacting of our items come with a one year warranty

We provide a 30 day money back guarantee on defective items. Restocking fees and other fees may apply upon the condition of the warranty does not cover damage caused by accident, abuse, neglect, modification, alteration, misuse, repair, or physical damages.

All NON-SELLER mistake's / returns are subject to a minimum of 20% restocking fee and the buyer is responsible for all return shipping that have been forwarded outside of the U.S will not be covered by our office hours are Monday-Friday, 10:00AM to 5:00PM (PST).

We are more than happy to help you check product compatibility, answer any question regarding our policy,  products, prices, shipping and handling  fees, returns and item details. Please contact us by clicking our ID "EXPERTBATTERY", then “Contact Member”. You can also reach us over the phone at 1(562) 630-3001

12V 21Ah Deep Cycle GEL VRLA Battery

• LxWxH: 7.13'' x 3.03'' x 6.10''
• Terminal: Insert Threaded terminals (5mm stud)
• Height with terminals: Certified
• 1-Year Warranty
• Highly Reviewed
• Freshest Rechargeable with the highest quality
• UL and CE Certified 
• ISO 14001:2015, ISO 18001:2004, ISO 19001:2015

Maintenance battery is manufactured with thick paste gel and advanced valve regulated technology which are no spills, no leaks, and no need to check the water. 

Long Shelf Life:

These gel Valve Regulated Lead Acid (VRLA) batteries can be stored for up to 6 months at 25°C (77°F) and the monthly self-discharge rate is lower than 3%. This spec is 5 times better than flooded batteries.

Extended Service Life:

Premium quality enables a life to go up to 1200-1400 cycles at 50% DoD in 25°C to prolong the batteries?

For the first use of the battery, we recommend a full discharge. Every use following, we would recommend a 50% discharge to extend the life span of the battery. We recommend using the same kind of batteries and a battery balancer when connected in series or in recommend using our 12V 4A charger for our 12V 21 Gel VRLA battery.                                                    charger should I use to charge the battery?

We recommend using a charger that is rated below 20% (max.) of the battery's rated capacity. i.e. 12V 1A (max) charger. 

AGM Batteries

VRLA Chargers

Gel Batteries

Lithium Batteries

Solar Panels

Solar Kits

We do not accept non-US credit cards.

For international orders, we accept orders through 's managed payment service.

IMPORTANT DELIVERY dates include seller's handling time, and will depend on shipping  service selected and receipt of cleared payment. Delivery times may vary, during peak periods.”

If additional postage is due upon receipt, please contact us prior to rejecting the package or payment of the package. We will not be responsible for the cost difference if payment is made prior to contacting of our items come with a one year warranty

We provide a 30 day money back guarantee on defective items. Restocking fees and other fees may apply upon the condition of the warranty does not cover damage caused by accident, abuse, neglect, modification, alteration, misuse, repair, or physical damages.

All NON-SELLER mistake's / returns are subject to a minimum of 20% restocking fee and the buyer is responsible for all return shipping that have been forwarded outside of the U.S will not be covered by our warranty

Our office hours are Monday-Friday, 10:00AM to 5:00PM (PST).

We are more than happy to help you check product compatibility, answer any question regarding our policy,  products, prices, shipping and handling  fees, returns and item details. Please contact us by clicking our ID "EXPERTBATTERY", then “Contact Member”. You can also reach us over the phone at 1(562) 630-3001

Part Number: BGHFM12_21-4