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16V 50AH LiFePO4 Deep Cycle Battery
SKU PGL16VM50
- Trusted by professionals
- Lightweight design
- Maintenance-free operation
Compact size. Lightweight lithium power.
50Ah capacity, just 11.68 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$42/mo with
Complete your setup
Fits the PGL16VM50-
PGC-116 On-Board Charger · 12/16VOn-board charging with lithium and AGM profiles.
$179.99
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Bass Tank Power Harness · SingleClean power to your graphs, no voltage drop.
$199.99
Pro-Guide Lithium 16VM50
With A Cycle Life Rated Up To 3000 Cycles, The Pro-Guide Lithium 16VM50 Battery Is Your New Favorite Choice For Powering Your Marine Electronics
- When you need power that’ll last, the 16VM50 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 800Wh, 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 12lbs, this battery will efficiently power your application without weighing you down!
Power Comes in small packages with the Pro-Guide Lithium 16VM50! An energy-dense pack that allows you to power big and small applications on the water!
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
- 11.68lbs / 5.3kg
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
Secure the battery so it can't shift in use.
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.
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: 11.68lbs / 5.3kg
- 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 | 16 |
| Amp Hours | 50AH |
| Watt Hours | 800WH |
| Charge Current (Standard / Max) | 10A / 25A |
| Terminal Type | Internal Thread (M6) |
| Weight (lbs / kg) | 11.68lbs / 5.3kg |
| 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.