1-800-827-3232
Find Your Battery
- 10 Year Warranty 60-month free replacement
- Free and Fast Shipping Ships within 24 hours
- Installation Support US-based battery experts
12V 50AH LiFePO4 Deep Cycle Battery
SKU PGLM50
- Trusted by professionals
- Lightweight design
- Maintenance-free operation
Compact size. Lightweight lithium power.
50Ah capacity, just 14 lbs.
Deep-cycle power in a compact case.
Maintenance-free operation.
No watering or routine electrolyte checks.
Built-in battery protection.
Helps protect against overcharging, over-discharging and short circuits.
U.S.-based support.
Battery expertise since 1980, with a team you can call.
As low as$34/mo with
Complete your setup
Fits the PGLM50-
12V 30A Lithium ChargerLiFePO4 charging profile matched to 12V.
$299.99
-
Connect-Ease 12V Trolling KitTrolling-motor hookup with on-board charging leads.
$59.99
-
PGLM50 Hold Down KitSecures the PGL M50 in place.
$49.99
Pro-Guide Lithium PGLM50
With A Cycle Life Rated Up To 3000 Cycles, The Pro-Guide Lithium PGLM50 Battery Is Your New Favorite Choice For Powering Your Boating & RV Adventures, Solar Storage, And More
- When you need power that’ll last, the PGLM50 is there to support you. Get more out of your fish finder, kayak, or other finesse applications
- With cycle lives rated beyond 3000 cycles @ 80% DOD and a capacity of 50Ah or 640Wh, you get a battery that performs at a high level over its whole lifespan
- With internal thread (M6) terminals, a secure connection is simple allowing peace of mind for your time on the water
- At only 14lbs, this battery will efficiently power your application without weighing you down!
Power Comes in small packages with the Pro-Guide Lithium PGLM50! An energy-dense pack that allows you to power big and small applications on the water, road, or trail!
Will it fit your setup?
Three quick checks before you order: your tray size, your cable connections and your charger. Everything you need is below.
Dimensions
- Length
- 7 3/4in / 196.9mm
- Width
- 6 1/2in / 165.1mm
- Height
- 6 9/10in / 175.3mm
- Weight
- 14lbs / 6.4kg
Measure your battery tray or the battery you are replacing and check it against these dimensions before you order.
What you'll need to install
A tray or hold-down sized for this battery
A matching tray or hold-down is in Complete your setup.
Your existing battery cables
Reuse them if the cable ends fit the battery's terminals (Internal Thread (M6)).
A lithium-compatible charger
Lithium needs a LiFePO4 charging profile. The 12V 30A Lithium Battery Charger in Complete your setup has it.
Basic hand tools
A wrench or socket for the terminal hardware.
Still not sure? Our US-based team will check it with you. 1-800-827-3232
- Weight: 14lbs / 6.4kg
- Built-in battery management system protects against over-charge, over-discharge and short circuit.
- Drop-in replacement when the group size and dimensions match your tray — no tray modification needed.
- Backed by 45 years of battery expertise and US-based support you can actually reach.
- 60 Month Free Replacement Warranty & 120 Month total Pro-Rata.
| Group Size | N/A |
|---|---|
| Voltage | 12 |
| Amp Hours | 50AH |
| Watt Hours | 640WH |
| Charge Current (Standard / Max) | 10A / 50A |
| Terminal Type | Internal Thread (M6) |
| Weight (lbs / kg) | 14lbs / 6.4kg |
| Length (in / mm) | 7 3/4in / 196.9mm |
| Width (in / mm) | 6 1/2in / 165.1mm |
| Height (in / mm) | 6 9/10in / 175.3mm |
| Bluetooth | Enabled |
Shipping
Free ground shipping on this item, typically delivered within 24 to 48 hours. Oversized and freight items note any exception on the product page itself.
Warranty
60 Month Free Replacement Warranty & 120 Month total Pro-Rata.
Register your battery online to activate coverage. Full terms are on the warranty information page.
Downloadable Resources
Frequently Asked Questions
What is a deep-cycle lithium battery designed for?
Deep-cycle lithium batteries are designed to provide steady power over long periods and handle repeated charge and discharge cycles. They are ideal for trolling motors, marine electronics, RVs, solar systems, fishing electronics and other applications that require sustained power.
Can this battery replace my lead-acid or AGM battery?
In many applications, yes. A LiFePO₄ battery can replace a similarly sized lead-acid or AGM battery while offering more usable capacity and less weight. Always verify voltage, physical dimensions, terminal configuration and charging compatibility before replacing your existing battery.
What charger should I use with this lithium battery?
Use a charger with a LiFePO₄-compatible charging profile that matches the voltage of your battery. Some existing chargers may be compatible, but the charging specifications should always be checked before use.
Can I connect multiple lithium batteries together?
Certain Pro-Guide lithium batteries can be connected in series or parallel depending on the model. Batteries used together should be the same model, capacity, age and state of charge. Always check the specifications for the individual battery before building a battery bank.
Can a Pro-Guide lithium battery be mounted in different positions?
Because LiFePO₄ batteries do not contain free-flowing liquid like flooded lead-acid batteries, they offer significantly more installation flexibility. Follow the mounting recommendations provided for your specific battery.