12V 22AH Sport Series Lithium Battery w/ Bluetooth (1222-BT)

Simple 10 Year Warranty
From the date of your battery purchase through year number 10 of ownership, your battery is covered. If it stops working during this time, we will repair or replace it with a battery of equal or greater value for FREE!

Recommended Charger
The Millertech 12V 22Ah lithium battery is engineered for a precise 14.6V charging profile.  For maximum performance, battery health, and a true 100% charge, the Millertech 12V 5A Lithium Battery Charger (125C) is strongly recommended.

The Sport Series Marine Batteries

The Sport Series Marine batteries are all sealed with a thick rubber gasket along the lid connection point. This means they are Marine approved IP65 rated. A completely sealed battery case will cause condensation, so we build them with a marine grade Stainless Steel breather vent. Our vent sits on the top of the case unlike some others where the vent sits down inside catching rain and dirt.

Custom molded, heavy duty, re-closable battery case. This means if you ever have an issue with your battery no matter is it in year 5 or year 15 we will always have easy access to repair any defective parts. This custom case also has convenient hold down strap grooves molded into the side corners helping to keep your straps seated securely in place.

Capacity – 22Ah

This battery has a storage capacity of 22 amp-hours (Ah). That means it can provide reliable power for mid-sized applications requiring longer runtime than smaller compact batteries.

Voltage – 12.8V

The battery operates at a nominal voltage of 12.8 volts. This allows it to serve as a direct replacement for traditional 12V lead-acid batteries while delivering more consistent output.

Weight – 7.8 lbs

The battery weighs 7.8 pounds. It is significantly lighter than comparable lead-acid batteries, making installation and transport easier.

Size – 7.125” × 3.125” × 6.125”

The battery measures 7.125 inches by 3.125 inches by 6.125 inches. Its compact design allows it to fit in many standard battery compartments without modification.

Warranty – 10 Years

This battery is backed by a 10-year warranty. It reflects the long service life and durability expected from lithium iron phosphate technology.

Battery Management System (BMS)

The battery includes an integrated Battery Management System (BMS). The BMS protects against over-charging, over-discharging, excessive current, and unsafe temperatures to extend battery life.

Chemistry – LFP (Lithium Iron Phosphate)

This battery uses Lithium Iron Phosphate (LFP) chemistry. LFP is known for superior safety, long cycle life, and stable thermal performance compared to other lithium chemistries.

Efficiency – 98%

The battery operates at 98% energy efficiency. This means nearly all stored energy is usable, resulting in longer run-times and faster charging.

Memory Effect

This battery has no memory effect. You can charge it at any state of charge without reducing overall capacity over time.

Max Charge Voltage – 14.6V

The maximum charging voltage for this battery is 14.6 volts. Charging within this range ensures a full charge while protecting the internal cells.

Peak Discharge Current – 66A (3 Seconds)

The battery can deliver up to 66 amps for short bursts lasting up to 3 seconds. This allows it to handle temporary high-demand loads such as motor starts or surge conditions.

Cut-Off Voltage – 10V

The battery has a low-voltage cut-off at 10 volts. This prevents over-discharge and helps preserve long-term battery health.

Max Charge / Discharge Current – 22A

The battery supports up to 22 amps of continuous charge and discharge current. This defines the safe operating range for sustained power draw and charging input.

Operating Temperature 32°F to 130°F

The battery is designed to operate in temperatures ranging from 32°F to 130°F. This wide operating range makes it suitable for both cold and hot environments.

Low-Temperature Charging Protection 

The battery includes built-in low-temperature charging protection. This prevents charging in freezing conditions to help protect the cells from damage.

Connection Capability – 4S-4P

The battery is built using a 4S-4P internal cell configuration. This means four cells are connected in series and four in parallel, balancing voltage and capacity for stable performance and longer lifespan.

Cell Type – Prismatic

The battery is constructed using prismatic lithium cells. Prismatic cells allow for efficient internal packaging and higher capacity within a compact footprint.

Terminals
Built with heavy-duty M8 stainless steel terminals and a robust 4S-4P configuration for powerful performance without excessive heat.

Built-In Bluetooth
Equipped with Bluetooth technology. The battery connects to an app that allows you to conveniently monitor multiple batteries at once—no more checking multiple apps. You can download the app here

Robust Design  for Longer Life
Robust yet lightweight, Millertech Sport Series Lithium Batteries can last up to 10X longer than AGM or lead-acid batteries. Never be stranded with a dead battery again!

THE MILLERTECH® SPORT SERIES LITHIUM BATTERY
10 YEAR GUARANTEED WARRANTY IS SIMPLE!

TERMS:

From the date of your battery purchase through year number 10 of ownership, your battery is covered. If it stops working during this time, we will repair or replace it with a battery of equal or greater value for FREE!

SHIPPING:

We cover all shipping costs associated with shuttling your battery back and forth for repair or replacement. It is our warranty; it is our cost; not yours.

EXCLUSIONS:

There are NONE! You trusted Millertech®, and if it’s within the warranty period your Millertech® battery is completely covered for everything!

PROOF OF PURCHASE:

You don’t need one. If it’s Millertech®, it’s covered!

FOR WARRANTY SERVICE CALL: 855-MAX-LITH

EMAIL:  warranty@millertechenergy.com