Upgraded dual-purpose battery with Smart Power Reserve Mode for safer, longer adventures.
One Battery, Two Purposes — From Engine Start to Onboard Power
Say goodbye to bulky dual setups. The LiTime 12V 165Ah Dual Purpose Marine Battery — upgraded from our best-selling 140Ah version — delivers marine starting and deep-cycle performance in one compact design. With 1200 CCA, it powers fuel-powered outboards up to 300 HP with instant confidence.
Start Strong, Power Longer
With 1200 CCA and 150A continuous discharge, the LiTime 12V 165Ah Dual Purpose Battery confidently cranks fuel-powered outboards for over 5,000 reliable starts. It powers both engines and onboard devices at once, delivering 4,000+ deep cycles — up to 8× longer than typical AGM batteries.
Smart Power Reserve for Every Start
Out on the water, the last thing you want is a dead battery. The upgraded Smart Power Reserve Mode automatically keeps 15% power reserved for a safe engine restart and cuts off discharge when voltage runs low. Manage everything anytime via the LiTime App and enjoy worry-free adventures from launch to landing.
Seamless Bluetooth Control
Stay connected to your power anytime, anywhere. With the LiTime App, you can monitor real-time battery status, switch functions, and manage performance with a single tap. Enjoy effortless control and instant OTA upgrades that keep your battery smarter and safer than ever.
Auto Heating for Reliable Cold-Weather Charging
The LiTime 12V 165Ah Dual Purpose Battery features an auto-heating system that activates between -20°C and 5°C (-4°F to 41°F). It warms the cells to 10°C (50°F) before charging begins, ensuring safe, efficient performance even in freezing conditions.
Compatible with Top Outboard Motor Brands
The LiTime 12V 165Ah Marine Starting Lithium Battery is engineered to power the most popular outboard motor brands — including Mercury, Honda, Suzuki, Evinrude, Tohatsu, and more.
Built for Safety, Proven to Last
LiTime 12V 165Ah dual purpose marine battery features self-developed BMS with 20+ smart protections—guarding against overcharge, over-discharge, overcurrent, overheating, and short circuits. Upgraded with low-temp cut-off, moisture and salt-spray resistance, plus 30s auto-recovery from overload, it ensures dependable performance even in harsh environments.
Next-Level Power Upgrade
The LiTime 12V 165Ah Dual Purpose Lithium Battery takes performance beyond the best-selling 140Ah version — with 1200 CCA (vs 1000 CCA), a 150A BMS (vs 140A), and 2112Wh energy (vs 1792Wh). It delivers smoother engine starts, steadier power, and longer runtime on every trip.
Half the Space, Twice the Energy
The LiTime 12V 165Ah Dual Purpose Battery delivers 76% more energy (2112Wh) while saving 50% space and cutting 75% weight compared to two 12V 100Ah lead-acid batteries. Enjoy easier installation, extra storage, and longer runtime — all in a compact Group 31 size.
IP67 Protection, Marine-Grade Confidence
LiTime 12V 165Ah dual purpose lithium battery comes with IP67 protection—water-proof, dust-proof, and salt-spray-proof. Whether you’re navigating rough seas, fishing in saltwater, or docking along the coast, it provides reliable performance and long-lasting durability in the harshest marine environments.
One Battery Does It All
LiTime 12V 165Ah dual purpose lithium marine battery lets you crank your outboard with confidence and power your onboard electronics all day—lights, radar, fish finder, and more. One battery, no extra hassle.
4 Charging Methods
Whether you use LiFePO4 battery charger, outboard alternator, generator, or solar panel, you can fully charge your battery efficiently and reliably.
Trusted Quality. Guaranteed Support.
Every LiTime battery undergoes rigorous testing and comes with trusted quality assurance. We offer professional technical support, a flexible return policy, a detailed user guide, and 24/7 online service for your peace of mind.
LiTime lithium starting batteries are equipped with a built-in smart Battery Management System (BMS) that limits the charging voltage to 15V or below, ensuring safe and stable operation of the battery cells.
In most cases, outboard motor charging systems are fully compatible with LiTime lithium starting batteries and can charge and operate normally.
However, a small number of outboard engines with special regulator models may not match lithium batteries properly.
If this occurs, there are two recommended solutions:
Important: Please DO NOT use this battery as a starter battery for any type of vehicle, including cars, motorcycles, tractors, etc.
For optimal use of the battery, please observe the following safety precautions:
1. Engine Compatibility: Not compatible with the outboard motor without a built-in regulator, or older voltage regulators.
2. Mounting Requirements: When using in marine starting equipment (such as fuel outboard engines) or in vibrating environments, ensure the battery is securely mounted. It should not be used in areas with severe vibrations, such as tractors.
3. Secure Fastening: Ensure the battery is fastened securely when used with outboard engines or in unstable environments to prevent damage from movement.
4. Cable Length Considerations: Position the battery as close to the outboard motor as possible, as varying cable lengths can result in voltage loss. If the voltage drop exceeds this range, reduce the total cable length.
Yes. With 1200 CCA @14°F and 1300 MCA @32°F, it can reliably crank outboard motors up to 300HP, including Mercury, Honda, Suzuki, Evinrude, and Tohatsu. Before purchasing, check that your motor's required CCA is ≤1200A. If you're unsure, share your motor's CCA/MCA requirements and alternator charging current, and we'll help confirm compatibility.
Yes, you can connect the battery in series and parallel. But here are some limitations to follow:
1. For Starting and Deep Cycle:
Support connecting up to 4 identical batteries in parallel for up to:12V(12.8V) 660Ah battery system.
Note: It can only be connected in parallel instead of a series connection.
2. For ONLY Energy Storage:
Support connecting up to 16 identical batteries for up to: 4 in series as a 48V (51.2V) battery system or 4 in parallel as a 660Ah battery system.
To connect in series or parallel, batteries should meet the following conditions:
a. identical batteries with the same battery capacity (Ah) and BMS (A);
b. from the same brand (as lithium batteries from different brands have their special BMS);
c. purchased in near time (within one month).
1. Charge before first use: The battery may arrive with low SOC due to shipping/storage. Fully charge it with a LiFePO4 charger before use to avoid over-discharge.
2. Starting requirements: Battery voltage must be above 11.5V to start a motor. Each start should not exceed 3 seconds; if it fails, wait 15 seconds before retrying. After 3 failed attempts, wait 5 minutes and check for other causes.
3. Bluetooth activation: Some Bluetooth batteries may arrive “off,” showing 3–5V. This is normal. Simply connect to an AC-DC LiFePO4 charger or MPPT solar controller for 3–10 seconds to activate.
4. Storage tips: For long-term storage, charge to 50% SOC and recharge every 3 months to maintain performance.
Yes. The 12V 165Ah marine starting battery is rated IP67 waterproof and dustproof. However, it should not be fully submerged in bilge water. For added protection, we recommend installing it in a waterproof battery box or mounting it in an elevated or sheltered position such as inside the cabin.
Installed the Li-Time 165ah as my starting / electronics battery in my boat. Mercury 75hp starts easy, electronics function perfectly. Also added two 100ah Li-TimeTrollers for 24v pairing. Ive been running the Trollers flawlessly for coming up 3 years.
Fantastic product. I was running 2 group 27 batteries to start my big motor and run my electronics and still by the end of tournament day I had to be careful or I couldn’t crank the big motor. After a full day of use I still have over 70% left on this battery with no power drop. As an added bonus by getting rid of the 2 cranking batteries and the 3 trolling batteries I replaced with the LiTime 36V 100A I’ve removed almost 200 pounds from the boat. Performance increased dramatically
Unbelievable longevity and power
I'm updating my boat and Ice Castle Wheel House. Replacing my old Interstate battery's. So I ordered two Li Time Lithium battery's. So far, they seem to be working great in my ice house in cold weather. And enough power for days on the ice. They were a great purchase !!!
I have 2 of these for my boats. Both work great so far! Fish all day using electronics, livewell, etc and it drops 15%. Bluetooth is the way to go to see right where the battery is.
Very nice starting battery, cant waittill I get my new outboard to try out...!
Using in my Winnebago Solis 59PX. I have only had these a couple weeks and haven't had a chance to use in camping conditions, but what a difference. There is no need to worry about anything, unlike the AGMs I killed by leaving the propane valve or Starlink on. Left both on to test it out and these shut down at the reserve limit (just in case) and I haven't yet had both of them hit that level. Also got to test the self-heating function and worked flawlessly!
We participated in a local tournament and used the boat for an entire day. Could no see more than to a 1% drop in power. Iam looking forward to really testing them in the coming months. Very please with the power delivery.
