Lower price range
Mighty Max ML35-12 12V 35Ah U1 Deep Cycle AGM Battery
Best for: Powering a fish finder, aerator, or small kayak setup on a budget.
$50-150
Weize · Marine Batteries
WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31
Popular value AGM at a low price per amp hour. The main tradeoff is weighs more than 60 lb.
Good fitBudget-conscious trolling motor or house power use where weight is not critical.
Think twiceWeighs more than 60 lb
$150-300 · check the retailer for current price and availability
1 supporting source · record reviewed July 26, 2026Decision notes
What it does well and what to watch for.
Start with how you plan to use it, then weigh these strengths and tradeoffs against your own setup.
Why it works
- Popular value AGM at a low price per amp hour
- Maintenance-free and leak-proof
- Standard Group 31 fit for most trolling motor trays
Watch for
- Weighs more than 60 lb
- Usable capacity is roughly half at a safe depth of discharge, like all lead-acid
Key details
Specifications at a glance.
- Price band
- $150-300
- Authority Score
- 8.0 / 10
- Chemistry
- AGM lead-acid
- Capacity
- 100Ah
- Group size
- 31
- Max discharge
- 1150A
- Self-discharge
- 3 percent per month
Sources and checks
Sources for WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31.
Record reviewed . Retailers confirm the exact seller, configuration, price, and availability.
These sources support the model identity and buying notes on this page. Shopping links are never treated as evidence.
Other budgets
Spend less, stay close, or step up.
Closest price range
LiTime 12V 100Ah Group 31 LiFePO4 Lithium Battery
Best for: Anglers wanting the lowest-cost lithium upgrade for trolling motors and electronics.
$150-300
Higher price range
ExpertPower 12V 100Ah LiFePO4 Deep Cycle Battery with Bluetooth
Best for: Boaters who want app-based battery monitoring in a mid-priced lithium.
$300-600
Complete the setup
Build the rest of the setup.
Small-boat fishing. Start with the pieces your day actually requires. These picks sit near the middle of each category's researched price range.
Trolling Motors
MotorGuide Xi3 Wireless Freshwater 55lb 48-inch with Pinpoint GPS
Why it belongs: Controls boat speed and position around wind, current, and structure.
Best for: Freshwater boaters who need a 48 inch shaft and want wireless Pinpoint GPS positioning from a single 12 volt battery.
$600-1000
Fish Finders
Garmin ECHOMAP UHD2 74sv
Why it belongs: Adds depth, structure, mapping, and sonar context to the water being covered.
Best for: The serious walleye or bass angler building toward live sonar who wants Garmin mapping now.
$600-1000
Tackle Boxes & Bags
KastKing BaitSpace 50L Fishing Tackle Backpack
Why it belongs: Keeps active presentations organized without taking over limited deck space.
Best for: Anglers who hike or shore-fish and need to carry a large, self-contained tackle load hands-free.
$50-150
Before you order
A few final checks.
Make sure the model fits your setup. Then use the retailer listing to confirm what is included, who is selling it, and how returns work.
Ready to check the listing?
$150-300Check price at AmazonOpens Amazon in a new tab. Price and availability can change.Where does the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 fit among marine batteries?
The intended WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 fit is clear: Budget-conscious trolling motor or house power use where weight is not critical. Check its measurements and category-specific specifications against your own equipment and conditions before ordering.
Why choose the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 over another marine batteries option?
The WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 earns attention because popular value AGM at a low price per amp hour. The catch is weighs more than 60 lb. Use the related models above to see whether another price range solves that problem.
How important is chemistry on the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31?
Fit for the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 starts with chemistry (AGM lead-acid), capacity (100Ah), and group size (31). If any detail differs from your needs, choose a different configuration or compare another model before ordering.
Which listing does the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 button open?
Price and stock for the WEIZE 12V 100Ah Deep Cycle AGM Battery, Group 31 can change. The retailer page is the final check for the selected configuration, current seller, delivery terms, and return window.