LiThink 12V 165Ah LiFePO4 Battery with 250A BMS, Bluetooth & Self-Heating — for RVs, Marine & Off-Grid Power
LiThink 12V 165Ah LiFePO4 Battery with 250A BMS, Bluetooth & Self-Heating — for RVs, Marine & Off-Grid Power
LiThink 12V 165Ah LiFePO4 Battery with 250A BMS, Bluetooth & Self-Heating — for RVs, Marine & Off-Grid Power

Why it stands out

Group 31

Size

Alloy

Internal Frame

Low-Temp

Cut-Off

5.0

Bluetooth

30+

Protections

Self

Heating

Why it stands out

Group 31

Size

Alloy

Internal Frame

Low-Temp

Cut-Off

5.0

Bluetooth

30+

Protections

Self

Heating

LiThink 12V 165Ah LiFePO4 Battery with 250A BMS, Bluetooth & Self-Heating — for RVs, Marine & Off-Grid Power

Sale price $399.99Regular price $599.99 39999:59999 Save $200.00
Ten-year warranty & 30-day free return policy included
250A Smart BMS
Stronger current support for demanding 12V power systems.
800A Surge Support
Built to handle short start-up peaks from high-draw loads.
Reinforced Inside
Alloy-frame internal structure for vibration and long-term safety.
Bluetooth App
Monitor SOC, voltage, current, temperature, and alerts.
Self-Heating
Supports safer charging in cold-weather conditions.
IP65 Protection
Sealed housing helps protect against dust and water jets.
More Runtime
A higher-capacity 12V upgrade for longer off-grid and onboard use.
4P4S Expansion
Flexible setup for RV, marine, solar, and backup systems.
Core Battery Advantages
  • Higher-capacity 12V upgrade: Rated at 12.8V 165Ah / 2112Wh, delivering more usable energy for RVs, camper vans, boats, off-grid solar systems, and backup power.
  • Longer-lasting than lead-acid: Designed for 4,000+ cycles, helping reduce replacement frequency and long-term energy cost compared with lead-acid batteries.
  • Bluetooth smart monitoring: Check SOC, voltage, current, temperature, alerts, and charging/discharging status directly from the app.
  • More runtime without a complex upgrade: A practical step up from smaller 100Ah batteries while keeping a familiar 12V system design.
Internal Build & Safety
  • Reinforced internal structure: Built with a high-strength alloy frame, fiberglass busbar sleeving, six-sided epoxy insulation plates, and screw-locking hardware to improve vibration resistance and long-term safety.
  • Built for mobile power environments: Helps reduce risks from vibration, movement, abrasion, and electrical contact during RV, marine, and off-grid use.
  • High energy density: Stores 2112Wh at approx. 15.6 kg / 34.4 lbs, making it easier to install than traditional lead-acid battery banks.
  • IP65 protection: Sealed housing helps protect against dust and water jets for outdoor, RV, marine, and mobile power environments.
  • Solid terminal hardware: M8 × 14 mm terminals with recommended tightening torque of 12 N·m; discharge cut-off voltage: 10.8V.
Power Output & Charging
  • 250A smart BMS: Provides intelligent protection against overcharge, over-discharge, overcurrent, short circuit, and temperature risks while supporting demanding 12V power systems.
  • Max. continuous discharge current: Up to 250A, giving RV, marine, and off-grid systems stronger current support for heavy 12V loads.
  • Surge discharge support: 800A/1s, 650A/3s, 500A/5s, 350A/10s — built to support short start-up peaks from high-draw loads.
  • Max. continuous output power: Up to 3200W, suitable for high-performance 12V inverter and onboard power setups.
  • Charging method: CC/CV charging with 14.6V charge voltage.
  • Charging current: Recommended charging current 33A; max. continuous charging current 250A. Estimated charging time: 33A @ approx. 5 hours.
Cold-Weather Protection
  • Automatic self-heating: When charging in cold conditions, the built-in heating system helps warm the cells for safer winter charging. Minimum charging current required for heating: 10A.
  • Low-temperature charging protection: Charging stops at 0°C / 32°F and resumes at 5°C / 41°F.
  • Typical heating time: Approx. 70–90 minutes from -10°C / 14°F and 100–150 minutes from -20°C / -4°F at 8A heating current.
  • Working temperature range: Charge 0°C to 50°C / 32°F to 122°F; discharge -20°C to 60°C / -4°F to 140°F.
Applications & Expansion
  • Versatile 12V applications: Suitable for RVs, camper vans, boats, trolling motors, off-grid solar systems, garage/workshop power, and home backup setups.
  • Expandable up to 4P4S: Supports flexible system expansion for higher voltage, greater capacity, and more use cases across RV, marine, solar, and backup power systems.
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Reliable delivery

Free U.S. Shipping — Fast delivery from our U.S. warehouse

Engineer-Level Support — Real help when you need it

10-Year Charger Warranty — Reliable coverage for daily use

30-Day Easy Returns — Simple, stress-free returns

12V 165Ah BT

Premium Features, Built In
More capacity, smarter protection, and RV-ready design — all in one compact battery.
165Ah Group 31 Power

More runtime in a familiar marine/RV battery size.

Low-Temp Protection

Safer in winter.

Self-Heating

Built for cold-weather charging.

800A Surge Support

Handles short start-up peaks.

250A BMS

Power for demanding loads.

Bluetooth 5.0

Check battery data anytime.

Alloy Frame Inside

Stronger structure for road vibration.

ECE R10 Certified

Tested for RV EMC compatibility.

4P4S Expansion

Flexible for more power setups.

Bluetooth app

Smarter monitoring, right from your phone.

Real-time data

SOC, voltage, current, and temperature — all in one view.

9 alerts

Key protection alerts help you react faster.

Remote support

Share battery status for quicker troubleshooting.

Series/parallel management

Easier monitoring for expanded battery banks.

Low-battery alert

Know when it’s time to recharge.

Cell monitoring

Track cell voltage for healthier battery performance.

Bluetooth app
Real-time data
9 alerts
Remote support
Series/parallel management
Low-battery alert
Cell monitoring

Industry-Leading Internal Structure

Triple temperature sensing
Real-time thermal monitoring helps protect the cells during charging, discharging, and cold-weather use.
Alloy support frame
Anti-swelling | leak-resistant | vibration-resistant | up to +30% longer cell life
Six-sided epoxy insulation
Full-sided epoxy insulation helps reduce contact risks and improves long-term electrical safety.
Magnetic Emergency Switch
Fiberglass sleeves protect busbars from abrasion and accidental contact under high-current output.
PERFORMANCE & BATTERY LIFE

Long-Lasting 165Ah Power in a Group 31 Case

5,000 +
Cycles @100% DoD
8,000 +
Cycles @70% DoD
15,000 +
Cycles @40% DoD
≤ 2%
Monthly self-discharge
10 Years
Warranty

165Ah / 2112Wh of dependable 12V LiFePO4 power in a Group 31 case — built for longer runtime, less maintenance, and lower lifetime cost than lead-acid.

HIGH-OUTPUT PROTECTION

250A Smart BMS.
More Power for Demanding 12V Systems

The 250A smart BMS delivers strong continuous output while monitoring battery status in real time. It helps protect against overcharge, over-discharge, overcurrent, short circuit, and extreme temperatures — giving your RV, marine, solar, and backup system more current headroom with safer control.

Cold-Weather Ready

The smart BMS pauses charging at 32°F / 0°C and resumes at 41°F / 5°C to help protect the cells. Discharge protection works down to -4°F / -20°C, making it ready for RV, marine, solar, and backup power use in colder conditions.

32°F
Charge cut-off
41°F
Charge resumes
-4°F
Discharge cut-off
14°F
Discharge resumes

When charging below 41°F / 5°C, the built-in heater starts automatically and warms the cells to 50°F / 10°C — helping make cold-weather charging safer for RVs, boats, garages, and off-grid systems.

≤41°F
Auto-heating starts
50°F
Heating stops

2× the capacity, half the weight

Double the capacity, half the weight, and up to 12× the service life — with lifetime energy cost as low as $0.03/kWh.

2× Capacity
Up to 2× more usable energy
1/2 Weight
Up to 50% lighter
12× Lifetime value
Up to 12× longer service life
$0.03 Energy cost
As low as $0.03/kWh over its lifetime

Surge Support for Demanding 12V Loads

Multi-stage surge output helps your inverter system handle short start-up peaks from pumps, compressors, small appliances, marine electronics, and backup loads.

800A / 1s
Peak surge output
600A / 3s
Heavy start-up support
400A / 5s
High-draw appliance support
250A / 10s
Stable short-term output
FLEXIBLE POWER EXPANSION

Start with 165Ah. Expand When You Need More.

RV & van life
Travel power
Garage/workshop
Tool support
Tent camping
Outdoor energy
Off-grid cabin
Remote power
UPS & backup
Emergency power
Boat / marine
Onboard energy

Start with one high-capacity Group 31 battery, then scale up to 4 in series and 4 in parallel for RV, marine, solar, off-grid, and backup systems.

GLOBAL COMPLIANCE

ECE R10 Compliant. Built for Mobile 12V Power.

EMC-tested to ECE R10 for reliable use in RV, marine, and mobile electrical systems. Built with smart BMS protection, reinforced internal structure, and trusted compliance for safer everyday 12V power.

Specifications & box contents

Basic Battery Specifications
Cell type

LiFePO4

Nominal voltage

12.8V

Rated capacity

165Ah

Energy

2112Wh

Cycle life

≥4000 cycles

Internal resistance

≤40mΩ

Battery management system bms

250A

Number of cells

4

Charging Specifications
Charge method

CC/CV

Charge voltage

14.6V

Recommended charge current

33A

Max continuous charge current

250A

Charging time at recommended current

33A @ 5h

Minimum charge current for heating function

10A

Discharging Specifications
Max continuous discharge current

250A

Max continuous output power

3200W

Discharge cut off voltage

10.8V

Surge discharge current

800A @ 1s

650A @ 3s

500A @ 5s

350A @ 10s

Self discharge rate

≤2%

Temperature Specifications
Charge temperature range

0°C to 50°C / 32°F to 122°F

Discharge temperature range

-20°C to 60°C / -4°F to 140°F

Storage temperature range less than 1 year

-20°C to 25°C / -4°F to 77°F

Storage temperature range less than 3 months

-20°C to 40°C / -4°F to 104°F

Storage temperature range less than 7 days

-20°C to 65°C / -4°F to 149°F

Low Temperature Protection & Heating Function
Low temperature charging protection

Yes

Stop charging temperature

0°C / 32°F

Resume charging temperature

5°C / 41°F

Heating temperature

>10°C / >50°F

Approx heating time 8a from 10 c 14 f

70–90 minutes

Approx heating time 8a from 20 c 4 f

100–150 minutes

Physical Specifications
Dimension

339 × 185 × 215 mm

13.34 × 7.28 × 8.46 inch

Battery weight

15.6 kg / 34.4 lbs

Cell weight

11.9 kg / 26.2 lbs

Housing material

ABS

Color

Black

Protection class

IP65

Connection & Installation
Terminals

M8 × 14mm

Recommended terminal torque

12N·m

Expansion Capability
Series and parallel connection

Up to 4P4S

What’s in the box

  • LiThink 12V 334Ah battery

  • User manual (DE/EN)

  • Bluetooth app card / warranty card (DE/EN)

  • Quick start guide (DE/EN)

  • 2× LiThink stickers

  • 2× M8 screws & 2× positive/negative terminal caps

Four ways to charge, one versatile battery

Whether you charge with a wall charger, on the road, through solar, or from a generator, your LiThink LiFePO₄ battery stays ready wherever you are.

Charger

Driving

Solar

Generator

FAQs

Still have questions?
Find more information in our FAQ.

Q: What applications is the LiThink 12V 165Ah Group 31 battery best suited for?

A: It is built for RVs, camper vans, marine house power, solar storage, off-grid cabins, garage power, and backup systems. With higher capacity than standard 100Ah batteries, it is ideal for users who need longer runtime in a familiar Group 31 battery size.

Q: What makes this 165Ah Group 31 battery different from a standard 100Ah LiFePO4 battery?

A: This battery provides 165Ah / 2112Wh of usable energy, giving you significantly longer runtime than a typical 100Ah battery. It also includes a 250A smart BMS, 800A surge support, Bluetooth monitoring, self-heating, ECE R10 compliance, and reinforced internal structure for more demanding 12V systems.

Q: What does the 250A smart BMS mean for real-world use?

A: The 250A smart BMS allows stronger continuous output for demanding 12V systems. It helps support RV inverters, marine equipment, pumps, solar storage, and backup loads while protecting the battery from overcharge, over-discharge, overcurrent, short circuit, and extreme temperatures.

Q: How does the 800A surge support help?

A: Some 12V devices require a short burst of current when starting, such as pumps, compressors, inverters, and certain onboard equipment. The 800A surge support gives the battery extra short-term current headroom for these start-up peaks.

Q: Can I monitor this battery with Bluetooth?

A: Yes. The Bluetooth app lets you check key battery data such as SOC, voltage, current, temperature, battery status, and alerts from your phone. This makes it easier to monitor power usage in RV, marine, solar, and backup systems.