FIELD-SPEC: MR137-120 · GROUP 31

Eliminate Downtime:
The Ultimate AGM Upgrade
for Industrial Barrel Lifters.

Replace standard 80Ah flooded batteries with 120Ah of military-grade, maintenance-free power. Engineered for severe vibration resistance and extended shift runtimes in Morse and similar heavy-duty lifts.

Capacity
120Ah
Group
31
Chemistry
AGM
Direct fit · Morse 400A-72-115 Group 31 footprint 12V · 120Ah C/20 Zero-maintenance VRLA Vibration tested Made for U.S. fleets
01Diagnose → Solution

Problem

The Flooded Battery Liability

Legacy flooded cells weren't built for the duty cycle your lifters see. The failure pattern is predictable — and expensive.

  • Acid leaks

    Sulfuric electrolyte corrodes lift chassis, terminals, and wiring harnesses.

  • Daily PM burden

    Water-level checks and equalization pull techs off the floor every shift.

  • Vibration failure

    Lead plates fracture under continuous lift cycle vibration.

  • Undersized capacity

    80–100Ah cells die mid-shift, stranding loads and operators.

Solution

VMAX Heavy-Duty AGM Technology

VRLA construction, military-grade plate alloys, and absorbed glass mat separators — engineered for the abuse.

  • 99.9% maintenance-free

    Sealed VRLA. No watering, no equalization, no acid spills.

  • Military-grade alloys

    Custom-cast plates resist shedding under deep-cycle abuse.

  • Shock & vibration rated

    AGM mat immobilizes electrolyte — survives constant lift motion.

  • 120AH DEEP CYCLE CAPACITY

    120Ah in the same Group 31 footprint as your 80Ah factory cell.

02Primary Recommendation
VMAX MR137-120 12V 120Ah Group 31 AGM deep-cycle battery
Part: MR137-120Made in USA materials

The Standard, Upgraded

VMAX MR137-120

A true deep-cycle Group 31 drop-in replacement that delivers a massive 120Ah capacity — outperforming standard 80Ah market alternatives by up to 50%.

Capacity (C/20)
120 Ah
Nominal Voltage
12 V
Form Factor
BCI Group 31
Plate Spec
Military-grade custom
Maintenance
Sealed / VRLA
Use Case
Industrial deep cycle
Shop the MR137-120 Ships from U.S. warehouse
03Capacity Upgrade Path

Double Your Operating Capacity:
Dual-Battery Lift Configurations

Many lift manufacturers, including Morse, support a factory-installed secondary battery. You can instantly double your runtime by adding a secondary battery box and running two MR137-120 units in parallel.

Net result

240Ah of usable AGM capacity — one full extra shift, zero PM.

MountVBB-31 Adjustable Battery Box

VBB-31 Adjustable Battery Box

Securely mount your secondary Group 31 battery to the lift chassis. Adjustable for Group 24–31 footprints.

View Battery Box
ChargeBC8S1215A 8-Stage Smart Charger

BC8S1215A 8-Stage Smart Charger

Required for optimal cycle life. Charges single or dual banks simultaneously with microprocessor-controlled precision.

View Smart Charger
04Verification & Data

The Numbers,
Side By Side.

Standard factory flooded cells vs. the VMAX MR137-120 AGM upgrade. Same footprint. Different class of equipment.

MetricStandard Flooded 80AhVMAX MR137-120
Nominal Capacity80 Ah120 Ah
ChemistryFlooded Lead-AcidAGM (VRLA)
MaintenanceWeekly wateringNone
Vibration ResistanceLowHigh (immobilized electrolyte)
Typical Cycle Life @ 50% DoD~400 cycles~900–1,000 cycles
Acid Leak RiskHighSealed — none

Verified field reviews

These batteries turned my heavy equipment into a hot rod. Reliable power all shift long.
Facility Engineer
I used these to replace the factory batteries in our electric lifts. High quality, exact fit, and the capacity difference is immediately noticeable.
Warehouse Operations Manager
We run our equipment hard all day. The VMAX deep cycle provides more than enough juice for continuous running, and zero maintenance.
Equipment Technician
Backed by VMAX USA

Engineered to Outlast.
Guaranteed to Perform.

Your operations rely on continuous power. We engineer our VRLA batteries with uncompromising standards to ensure they work as hard as you do. Supported by a 12-month hassle-free warranty and backed by our dedicated technical support team based in the USA.

12 mo
Warranty
USA
Tech Support
VRLA
Sealed Build
Equip Your Lifts Today