Skip to product information
1 of 1


MillerTech 33Ah 12V PREMIUM Lithium Iron Phosphate (LiFePO4) Smart Battery (1233L)

MillerTech 33Ah 12V PREMIUM Lithium Iron Phosphate (LiFePO4) Smart Battery (1233L)

Regular price $239.00 USD
Regular price $249.00 USD Sale price $239.00 USD
Sale Sold out
Shipping calculated at checkout.

MillerTech lithium batteries are lightweight, non-toxic, and long lasting compared to traditional lead acid batteries. Each battery has a built in battery management system (BMS) which provides safety and proper charging/discharging. Each battery also features a built in state of charge (SoC) meter which allows you to conveniently check the voltage and remaining charge of the battery without a multimeter.

MillerTech PREMIUM lithium batteries are built with Grade A lithium iron phosphate (LiFePO4 or LFP) cells and are guaranteed for 5 years with a full repair/replace warranty. Each battery will last over 3,000 cycles at the most extreme use: its full discharge rate (1C or 33A) all the way to empty (100% depth of discharge). Or if you are a lighter user it will last well over 8,000 cycles at 40% depth of discharge.

33Ah 12V LiFePO4 Deep Cycle 1233L Battery Specifications:

  • Cell Construction:  Cylindrical
  • Cell Grade:  Certified Grade A
  • Efficiency:  98%
  • Max Charge Voltage:  14.6V
  • Cut Off Voltage:  10.5V
  • Continuous Charge/Discharge Current:  33A
  • Peak Discharge Current:  99A for 5 seconds
  • Operating Temperature:  -10F to 130F
  • Low Temperature Charging Protection: Cutoff 30F, Reconnect 32F
  • Connection Capability:  4S or 4P (parallel preferred)
  • Weight:  10 pounds
  • Size:  7.75" x 5.25" x 7"
  • Warranty:  Full 5 years (not prorated)
  • Cycle life @ 100% depth of discharge:  3000+ cycles (>80% capacity remaining)
  • Cycle life @ 40% depth of discharge:  8000+ cycles (>80% capacity remaining)
View full details

Customer Reviews

Based on 1 review
Darl Black
Millertech gets Thumbs Up

The Millertech 32Ah 12v battery is the first lithium battery I've put in my boat. It runs my Garmin electronics. I've had in the boat for about three months and have been pleased with its performance.