Description
12V 40Ah Lithium Battery — CLI40-12
The Canbat CLI40-12 is a 12V 40Ah lithium battery delivering 512Wh of usable LiFePO4 energy in a compact 196 × 166 × 175 mm footprint at just 12.3 lbs (5.58 kg) — purpose-built for auxiliary electronics, compact marine systems, mobile instrumentation, lightweight portable power, and commercial equipment deployments where a small, reliable, maintenance-free 12V lithium source is the requirement. It occupies a well-defined position in the Canbat standard lineup as the ultra-compact auxiliary deep-cycle platform — engineered to the same technical standards as the larger models in the range, optimised for low-to-moderate load applications where weight and form factor are the primary constraints.
At 12.3 lbs, the CLI40-12 is one of the lightest LiFePO4 deep-cycle batteries in the Canbat lineup — light enough to carry in one hand, transport in a portable equipment case, or mount in confined spaces where larger batteries cannot be installed. Despite its compact dimensions, it delivers 40A continuous discharge, 3,000–5,000 cycle life at 100% depth of discharge, and the full BMS protection suite found across the Canbat standard lithium range.
It ships free across Canada and the USA, carries a 10-year warranty, and is built with UL 1642 certified cells. For Canada and USA orders, there are no import duties or cross-border complications.
512Wh of Usable Energy — At Just 12.3 lbs
The CLI40-12 shares the same 196 × 166 × 175 mm footprint as the CLI50-12 while coming in 2.2 lbs lighter — making it the correct specification for applications where the absolute minimum weight is required alongside reliable 12V deep-cycle performance. For kayak fishfinder setups, compact electronics banks, lightweight mobile equipment, and auxiliary installations with strict weight limits, every pound matters and the CLI40-12 delivers.
A comparable AGM battery at 40Ah nominal delivers approximately 20Ah of usable energy before its depth-of-discharge limit is reached. The CLI40-12 delivers its full 40Ah at 100% usable depth of discharge — twice the accessible energy at significantly less weight, with stable voltage maintained throughout the entire discharge cycle.
Maintenance-free operation, sealed construction, and no off-gassing make the CLI40-12 suitable for enclosed compartments, sealed enclosures, and installations where a vented battery would be impractical or unsafe.
Applications
Marine Electronics & Fishfinders
The CLI40-12 is well suited as a dedicated electronics bank for kayak fishing, compact fishing vessels, and canoe setups running a fishfinder, chartplotter, VHF radio, and navigation lights. At 12.3 lbs it adds minimal weight to a vessel where every pound affects performance, and its stable flat discharge voltage maintains consistent display brightness and signal quality throughout the day — unlike AGM batteries where voltage decline progressively affects electronics performance.
Compact Trolling Motors
For smaller electric trolling motors on kayaks, canoes, and lightweight tenders where minimizing weight is prioritized over extended runtime capacity, the CLI40-12 provides sufficient runtime at minimum weight — maintaining stable thrust from a consistent voltage output rather than declining performance as the battery depletes under lead-acid chemistry.
Mobile Instrumentation & Remote Monitoring
For remote monitoring stations, environmental sensing equipment, mobile data collection systems, and field instrumentation where a compact, reliable 12V power source is required with minimal maintenance overhead, the CLI40-12 provides long-cycle-life lithium performance in a deployable form factor. Its low self-discharge rate — under 3% per month — makes it suitable for installations that are serviced infrequently or left unattended for extended periods.
Mobile Equipment & Auxiliary Power Systems
For mobile traffic control equipment, compact surveillance systems, portable communications infrastructure, robotic platforms, and mobile service equipment where physical space, deployment weight, and long-term reliability are equally important, the CLI40-12 delivers maintenance-free lithium performance with a total cost of ownership significantly lower than sealed lead-acid alternatives — particularly in deployments where battery replacement and service access are logistically constrained.
Portable Power & Compact Auxiliary Installations
For portable power boxes, compact auxiliary battery installations in vehicles and service equipment, and any application requiring a lightweight sealed 12V lithium source in a confined space, the CLI40-12 fits where larger batteries cannot while delivering the cycle life and reliability that AGM alternatives in the same size cannot match.
12V 40Ah Lithium Battery for Marine Electronics, Mobile Equipment & Auxiliary Power
The CLI40-12 is Canbat’s ultra-compact auxiliary deep-cycle lithium battery — designed for buyers sourcing a 12V 40Ah lithium battery for marine electronics, compact trolling systems, mobile instrumentation, and auxiliary power applications where minimum weight and compact dimensions are the primary requirements alongside reliable LiFePO4 performance.
For Canadians sourcing a 12V 40Ah lithium battery, the CLI40-12 ships free with no import duties, is backed by a Canadian technical team, and carries a 10-year warranty. Compatible with all major chargers and solar charge controllers that support a LiFePO4 charging profile. For systems requiring greater capacity in the same compact footprint, the CLI50-12 offers 50Ah at identical dimensions.
Runtime & Performance
The CLI40-12 delivers 512Wh of usable energy at 12V nominal — all accessible at 100% depth of discharge on every cycle with stable voltage throughout:
| Application / Load | Average Draw | Estimated Runtime |
|---|---|---|
| Fishfinder + chartplotter + nav lights | ~4–8A | ~5–10 hours |
| Kayak trolling motor — low speed | ~15–20A | ~2–2.5 hours |
| Remote monitoring / instrumentation | ~1–3A | ~13–40 hours |
| LED lighting & device charging | ~4–6A | ~6–10 hours |
| 12V portable fridge | ~4–8A average | ~5–10 hours |
| Auxiliary communications equipment | ~2–5A | ~8–20 hours |
Runtime figures are based on 100% usable depth of discharge. The CLI40-12 maintains stable voltage throughout the discharge cycle — consistent performance from start to finish, without the progressive voltage decline that affects electronics sensitivity and motor performance in AGM batteries.
Series & Parallel Expandability
The CLI40-12 supports both series and parallel connections — up to 4 units in either configuration — allowing the system to scale as energy requirements grow.
| Configuration | Units | System Voltage | Total Capacity |
|---|---|---|---|
| Single unit | 1 | 12V | 40Ah / 512Wh |
| Parallel x2 | 2 | 12V | 80Ah / 1,024Wh |
| Parallel x3 | 3 | 12V | 120Ah / 1,536Wh |
| Parallel x4 (max) | 4 | 12V | 160Ah / 2,048Wh |
| Series x2 | 2 | 24V | 40Ah / 1,024Wh |
| Series x3 | 3 | 36V | 40Ah / 1,536Wh |
| Series x4 (max) | 4 | 48V | 40Ah / 2,048Wh |
Start with a single unit and expand as your system grows — the CLI40-12’s modular architecture supports the full range of 12V, 24V, 36V, and 48V system configurations.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | CLI40-12 |
| Chemistry | Lithium Iron Phosphate (LiFePO4) — Prismatic cells |
| Nominal Voltage | 12V (12.8V nominal) |
| Capacity | 40Ah |
| Energy | 512Wh |
| Cycle Life | 3,000–5,000 cycles at 100% DoD |
| Max Continuous Discharge | 40A |
| Peak Discharge | 170A for 3 seconds |
| Max Charge Current | 40A (recommended 20A) |
| Charging Temperature | 0°C to 45°C (32°F to 113°F) |
| Discharge Temperature | -20°C to 60°C (-4°F to 140°F) |
| IP Rating | IP54 — splash and dust resistant |
| Weight | 12.3 lbs (5.58 kg) |
| Dimensions (L x W x H) | 196 x 166 x 175 mm / 7.72 x 6.54 x 6.89 in |
| Terminal Type | M8 / 1.25 — bolts included |
| Mounting | Upright or on side |
| Parallel Expansion | Up to 4 units (160Ah / 12V maximum) |
| Series Expansion | Up to 4 units (24V, 36V, or 48V systems) |
| BMS Protection | Over-charge, over-discharge, short circuit, over-current, temperature extremes, cell balancing |
| Bluetooth Monitoring | Optional add-on (Canbat BT app — free for iOS and Android) |
| Storage | Store at 80–100% SoC in a cool, dry environment |
| Certification | UL 1642 certified cells |
| Warranty | 10 years |
| Shipping | Free across Canada and USA — no import duties |
Battery Management System and Bluetooth Monitoring
The CLI40-12’s integrated BMS manages cell-level protection and balancing automatically — no external battery management required.
- Over-discharge protection — prevents cell damage from excessive depth of discharge
- Over-charge protection — disconnects at the correct voltage ceiling
- Short circuit and over-current protection — responds within milliseconds
- High-temperature cutoff — protects cells during charging in hot environments
- Cell balancing — maintains consistency across the prismatic cell groups over thousands of cycles
The optional Bluetooth add-on connects the battery to the free Canbat BT app, available for iOS and Android. Monitor state of charge, voltage, current, and cell temperature in real time — useful for remote monitoring deployments and installations where direct battery access is limited.
System Compatibility and Installation
The CLI40-12 is compatible with any charger, solar charge controller, or inverter/charger that supports a LiFePO4 charging profile. When replacing a lead-acid battery, verify that the charging system’s voltage settings are configured for lithium. M8 terminals with bolts are included. The battery installs upright or on its side.
For system sizing assistance or compatibility questions, Canbat’s Canadian technical team is available by phone, email, and live chat.
Canadian Supply, Support and Warranty
Canbat is a Canadian battery manufacturer. The CLI40-12 ships free to any address in Canada and the USA. Canadian and US buyers pay no import duties and face no cross-border complications on their orders.
The CLI40-12 is backed by a 10-year warranty and supported by a Canadian technical team available by phone, email, and live chat. Warranty claims can be submitted directly with Canbat — with no overseas support queues and no runaround.
Sophia F. –
I bought two of these 40Ah batteries for my wheelchair. I can now go distances that were not possible before.
Amihan U. –
This is the most efficient 40Ah lithium battery I have seen. Very powerful and highly reliable battery. I have a cleaning company and I am using the lithium battery in a floor cleaning machine. After what I have seen, I am upgrading all of the other machines that have flooded batteries to these lithium ones.
Nancy L. –
Over the years, I bought many batteries for my wheelchair. In fact, I replace my wheelchair batteries every two years. All of the batteries I’ve been using throughout the years are lead acid. When I came across this 40Ah lithium battery, I knew I had to get one for my wheelchair, and aren’t I glad I made that decision. It’s only been a few months since I’ve installed the lithium battery in my wheelchair, but I know it’ll take years before I need to replace it. Two things I really love though is the distance I’m able to travel with my wheelchair now with lithium batteries and also I love how light the battery is. Installing it was so easy. Love the battery and I love that it’s Canadian!
George V. –
I have looked everywhere for this 12V 40Ah lithium battery and Canbat seems to be the only battery supplier in Canada that has it. I am very glad I found it and that the quality is super good.
Ayla H. –
Great lithium wheelchair battery, especially for longer trips. Highly recommended.
Victoria N. –
I had two 35Ah lead acid batteries in my electric scooter. I replaced them with two of these 40Ah lithium batteries from Canbat. Very happy with them. Because they’re much lighter than lead-acid, they were very easy to install. They also let me go much further distances. I purchased the lithium batteries online directly from Canbat and I did the replacement myself.
Jacob K. –
We bought these 12V 40Ah lithium batteries for our robots which we manufacture for the agricultural market. The batteries are very light and they provide a long runtime. Will be buying more for sure.
Maria K. –
This is the best 40Ah lithium floor machine battery in Canada. It’s very light and the dimensions fit perfectly as a replacement for my lead acid. Before my purchase, I contacted Canbat and their customer service was outstanding. They helped me select the more suited battery for my floor machine and helped me place the order over the phone.
Jack M –
I bought this and connected it to my 350watt @12 volt solar panel running through an MTTP controller, works great. Thanks, Canbat 🙂
Cosimo P. –
Great battery for my electric scooter. Canbat took their time finding me the right battery!
Christine K. –
Great battery, I use this for my emergency backup power. So far I am happy with the battery.
Ayla R. –
We’ve been purchasing the Relion RB40 for two years and they’ve been working great. However, Relion had a shortage of the RB40 battery and we needed to find another supplier with a similar battery. We found the Canbat 12V 40Ah lithium battery which came in the exact dimensions and very similar performance at a fraction of the price. The Canbat RB40 replacement also has built-in Bluetooth monitoring, which made our project 10 times better. Since then, we’ve been buying the 40Ah lithium batteries from Canbat and we are very happy with the quality, shipping speed and customer service!
LAURENT R. –
J’ai récemment fait l’acquisition de cette batterie et je suis conquis. Elle a donné une nouvelle vie à mon vélo électrique, avec une qualité qui dépasse toutes mes attentes.
Quentin D. –
J’ai acheté cette batterie 12V 40Ah pour faire fonctionner ma pompe de cale 3700, et le résultat est satisfaisant : elle fonctionne parfaitement pendant le temps nécessaire. Je suis très content des conseils que Canbat m’a donnés. Leur support a même pris la peine de me demander toutes les données techniques de ma pompe pour s’assurer que la batterie était compatible. Une excellente qualité de service.