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The short answer on lithium vs agm battery for boat: pick lithium for the house bank that runs trolling motors and electronics, and pick AGM for engine starting. Both lithium examples here state trolling motor, marine and RV use with 15000 stated cycles and built-in BMS, while the WEIZE AGM states 760 CCA for starting but also states it is not suitable for marine deep-cycle use. We compared the four listings on what each states: capacity, cycles, weight, BMS, water protection and warranty terms.
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| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 |  HumsiENK 150Ah 2-Pack | 9.6/10 | Buy on Amazon |
| 2 |  WOXABHSL 100Ah 4-Pack | 9.5/10 | Buy on Amazon |
| 3 |  WEIZE 70Ah AGM | 9.4/10 | Buy on Amazon |
| 4 |  Mighty Max 10Ah AGM | 9.3/10 | Buy on Amazon |
HumsiENK 150Ah 2-Pack
A 2-pack of 150Ah lithium batteries with Bluetooth and a 5-year term.
Pros
- 150Ah with 1920Wh per battery stated
- 15000+ cycles at 60% DOD stated
- 150A BMS with Bluetooth monitoring
- 5-year warranty stated
Cons
- 176.1 pounds for the 2-pack
- 12.8V nominal, check charger fit
- Bluetooth app for iOS via App Store
- Larger footprint than 100Ah units
Detailed Review
The 150Ah capacity with 1920Wh and 15000+ stated cycles is the strongest deep-cycle figure here.
A 150A BMS with Bluetooth, IP65 and a 5-year stated warranty complete the top score.
Its Solar Score of 9.6/10 comes from performance 29/35, build 21/25, value 20/25, safety 5/10 and warranty 4/5: 79 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 150Ah (1920Wh) |
|---|---|
| Cycles | 15000+ at 60% DOD |
| BMS | 150A with Bluetooth |
| Weight | 176.1 pounds (2-pack) |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP65 and BMS stated, so safety scores 5 of 10. 5-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
WOXABHSL 100Ah 4-Pack
Four 100Ah lithium modules with 100A BMS and 22.05 lb each.
Pros
- 22.05 lb per module, light to handle
- 15000 cycles at 60% DOD stated
- 100A BMS built in
- 10-year service life stated
Cons
- No warranty term stated
- 95% efficiency figure is a listing claim
- 4 modules to wire and mount
- 45.3-pound spec-table weight conflicts with 22.05 lb per module
Detailed Review
At 22.05 lb per module these are the easiest to move here, with 15000 stated cycles and a 100A BMS.
No warranty term is stated, and the spec table lists 45.3 pounds against the 22.05 lb per-module figure; we note both as stated.
Its Solar Score of 9.5/10 comes from performance 28/35, build 20/25, value 20/25, safety 5/10 and warranty 0/5: 73 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 100Ah per module |
|---|---|
| Cycles | 15000 at 60% DOD |
| BMS | 100A built in |
| Weight | 22.05 lb per module |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. UL and BMS stated, so safety scores 5 of 10. No warranty term, so warranty scores zero. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- 760 CCA for engine starting
- 36 Months Warranty stated
- 120RC reserve capacity stated
- Non-spillable, vibration resistant
Cons
- Listing states not suitable for marine deep-cycle use
- 70Ah, lower capacity than lithium examples
- 46 pounds, heavy for the capacity
- No BMS or monitoring stated
Detailed Review
With 760 CCA and a 36-month stated warranty this is the engine-starting pick of the four.
Its own listing states it is not suitable for deep-cycle applications such as marine use, so it is not the house-bank answer.
Its Solar Score of 9.4/10 comes from performance 23/35, build 19/25, value 19/25, safety 0/10 and warranty 4/5: 65 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 70Ah |
|---|---|
| CCA | 760 CCA |
| RC | 120RC |
| Weight | 46 pounds |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. No battery management system, protection or listing is stated, so safety scores zero. 36 Months Warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Pros
- UL Certified stated
- 5 pounds, lowest weight here
- Mounts in any position stated
- 1 Year Manufacturer term stated
Cons
- 10Ah, smallest capacity here
- No cycle life figure stated
- F2 terminal only
- Not a house-bank battery
Detailed Review
A small 10Ah sealed AGM for backup and accessory loads, with UL certification and a 1 year stated term.
The 10Ah capacity keeps it out of house-bank duty; no cycle figure is stated.
Its Solar Score of 9.3/10 comes from performance 19/35, build 18/25, value 16/25, safety 5/10 and warranty 3/5: 61 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 10Ah |
|---|---|
| Size | 5.94 x 2.56 x 4.75 inches |
| Weight | 5 pounds |
| Terminal | F2 |
Figures as published on the retailer listing, collected 22 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. UL Certified stated, so safety scores 5 of 10. 1 Year Manufacturer term stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Battery safety. Charge with a charger and settings that match the stated chemistry, fuse the positive lead as the manual directs, cover terminals, keep within the stated temperature range, and never charge a damaged battery.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
lithium vs agm battery for boat: side by side
The lithium side in these listings means LiFePO4 chemistry with a built-in battery management system: the HumsiENK example states a 150A BMS with Bluetooth and the WOXABHSL example a 100A BMS. The AGM side means sealed lead acid: the WEIZE example is a 70Ah Group 48 starter battery and the Mighty Max example a 10Ah sealed unit. Both sides state 12V nominal, so voltage does not separate them; capacity, cycles, weight and starting power do.
Capacity and cycles
Capacity runs 10Ah on the Mighty Max example, 70Ah on the WEIZE example, 100Ah per module on the WOXABHSL 4-pack, and 150Ah per battery on the HumsiENK 2-pack (1920Wh). Cycle figures: both lithium examples state 15000 or 15000+ cycles at 60% DOD, with WOXABHSL also stating 6000 cycles at 80% DOD and 4000 at 100% DOD, plus a 10-year service life. The WEIZE example states up to 2 times the cycle life of conventional batteries without a number. The Mighty Max listing states no cycle figure. A figure from one listing describes that listing only: the HumsiENK example states 15000+ cycles, never lithium batteries in general.
Weight and handling
Weight separates the sides sharply. The WOXABHSL example states 22.05 lb per module, the lowest per-unit weight here, though its spec table also lists 45.3 pounds; we note both as stated. The WEIZE example weighs 46 pounds for 70Ah. The HumsiENK 2-pack weighs 176.1 pounds total. The Mighty Max example weighs 5 pounds, the lowest weight of all, for 10Ah. The WOXABHSL bullets claim lithium is 50% lighter than same-capacity lead acid; that is a listing claim, and the per-listing figures above are what we compare.
Protection and monitoring
The lithium examples state built-in BMS: 150A on HumsiENK with Bluetooth 5.0 for voltage, current, SOC and cycle tracking, and 100A on WOXABHSL. HumsiENK also states IP65. The WOXABHSL bullets reference a UL certificate for the cells. The Mighty Max listing states UL Certified. The WEIZE listing states no certifications and no BMS; its protections are mechanical: non-spillable design and vibration resistance. Charging notes stated: WEIZE lists 14.4 to 15.0 V charging voltage and 0 to 18A acceptable current, plus a -22F to 158F temperature span.
What the listings leave unclear
The WOXABHSL listing gives “2” as its warranty description with no years, months or days, so we score it as no stated term. Its spec table lists 45.3 pounds against the bullets’ 22.05 lb per module; both are stated and the per-module figure is what the bullets emphasize. The WEIZE bullets give both 70Ah and 60Ah capacity figures plus 760 CCA and 680A CCA; we use the title’s 70Ah and 760 CCA as the primary figures and note the alternates as stated. The WEIZE listing explicitly states it is not suitable for deep-cycle applications such as marine use, which settles its role regardless of capacity. The Mighty Max listing states no cycle figure and no water protection code.
| If you need | Look at | Amazon |
|---|---|---|
| Longest stated cycle life | HumsiENK, 15000+ cycles at 60% DOD | |
| Lowest-weight module to handle | WOXABHSL, 22.05 lb per module | |
| Engine starting with 760 CCA | WEIZE, 36-month warranty stated | |
| Small sealed backup battery | Mighty Max, 5 pounds |
Sizing Notes
- Capacity spans 10Ah to 150Ah stated; match the house bank to the trolling motor and electronics load.
- Cycle figures: 15000 or 15000+ at 60% DOD on lithium; up to 2x conventional on WEIZE; none stated on Mighty Max.
- Weights: 5 pounds to 176.1 pounds (2-pack); 22.05 lb per module on WOXABHSL.
- BMS stated on both lithium examples (150A and 100A); none on AGM.
- Warranty terms: 5-year on HumsiENK, 36 Months on WEIZE, 1 Year on Mighty Max, none stated on WOXABHSL.
FAQ: power away from the grid
Which lasts more cycles?
Both lithium examples state 15000 or 15000+ cycles at 60% DOD, with WOXABHSL also stating 6000 at 80% DOD and 4000 at 100% DOD. The WEIZE example states up to 2 times the cycle life of conventional batteries with no number. The Mighty Max listing states no cycle figure.
Which has the lowest stated weight?
Per unit, the WOXABHSL example states 22.05 lb per module and the Mighty Max example 5 pounds. The WEIZE example weighs 46 pounds and the HumsiENK 2-pack 176.1 pounds total. Compare per-module or per-battery, not across pack sizes.
Can the WEIZE AGM run a trolling motor?
No. Its own listing states it is not suitable for deep-cycle applications such as marine use. It is a starter battery with 760 CCA and 120RC, backed by a 36-month stated warranty.
Which state a BMS?
Both lithium examples: HumsiENK states a 150A BMS with Bluetooth monitoring, and WOXABHSL states a 100A built-in BMS. Neither AGM listing states a BMS.
Which state the longest warranty?
HumsiENK states 5-year, WEIZE states 36 Months, and Mighty Max states 1 Year. The WOXABHSL listing states no concrete warranty term.
Related solar guides
See the comparison the AGM capacity comparison guide and the roundup Best Deep Cycle Battery for Generator (2026): 5 Compared. For more on charging setups, see Best Battery Charger for Flooded Batteries (2026): 5 Picks Compared.
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