Lawn Mower Battery Size Chart

Choosing the right battery size for your lawn mower is crucial for its performance and longevity. A larger battery may offer longer run times, but it can be heavier and more expensive. On the other hand, a smaller battery might save cost and weight but may require more frequent charging, affecting convenience.

Lawn Mower Battery Size – 12volts 100ah Lithium Iron Phosphate Battery

Model Voltage (v)Battery Capacity (AH)Maximum Charge Current(Amperes)Weight in (kgs and PoundsBattery Physical Dimensions in (mm and inches) LengthWidth in (mm and inches)Height in (mm and inches)Battery Cycle Life
B-LFP 12-4012v40ah20A6 kgs
13.22 pounds
195 mm
7.677 inches
130 mm
5.118 inches
168 mm
6.614 inches
>2000
B-LFP 12-5012v50ah30A7 kgs
15.43 pounds
229 mm
9.015 inches
138 mm
5.433 inches
213 mm
8.385 inches
>2000
B-LFP 12-8012v80ah30A12.8 kgs
28.219 pounds
262 mm
10.315 inches
167 mm
6.574 inches
212 mm
8.346 inches
>2000
B-LFP 12-10012v100ah50A14 kgs
30.86 pounds
323 mm
12.716 inches
173 mm 6.811 inches218 mm
8.582 inches
>2000
B-LFP 12-12012v120ah60A16 kgs
35.27 pounds
323 mm
12.716 inches
173 mm
6.811 inches
218 mm
8.582 inches
>2000
B-LFP 12-15012v150ah75A24 kgs
52.91 pounds
485 mm
19.094 inches 
172 mm
6.771 inches
240 mm
9.448 inches
>2000
B-LFP 12-17012v170ah85A26 kgs
57.32 pounds
485 mm
19.094 inches
172 mm
6.771 inches
240 mm
9.448 inches
>2000
B-LFP 12-20012v200ah100A30 kgs
66.138 pounds
520 mm
20.472 inches
269 mm
10.590 inches
205 mm
8.070 inches
>2000
B-LFP 12-24012v240ah120A34.2 kgs
75.398 pounds
520 mm
20.472 inches
269 mm
10.59 inches
208 mm
8.188 inches
>2000
B-LFP 24-5024v50ah25A14.8 kgs
32.628 pounds
520 mm
20.472 inches
380 mm
14.960 inches
290 mm
11.417 inches
>2000
B-LFP 24-10024v100ah50A28 kgs
61.729 pounds
520 mm
20.472 inches
450 mm
17.716 inches
350 mm
13.779 inches
>2000
B-LFP 24-15024v150ah50A42 kgs
92.59 pounds
520 mm
20.472 inches
450 mm
17.716 inches
400 mm
15.748 inches
>2000
B-LFP 24-20024v200ah50A56 kgs 123.459 pounds520 mm
20.472 inches
380 mm
14.960 inches
290 mm
11.417 inches
>2000
B-LFP 24-25024v250ah50A70 kgs
154.324 pounds
600 mm
23.622 inches
450 mm
17.716 inches
350 mm
13.779 inches
>2000

Most Popular Lawn Mower Battery Sizes and Features Chart

Battery SizeDimensions in (inches and mm)Battery CapacityBatteries Cold Cranking Amps (CCA)Weight in (kgs and pounds)
YTX5L-BS4.4375 by 2.75 by 4.125 inches4 Ah (10h)70 to 801.5 to 2 kgs
3.3 to 4.5 pounds
YTX9-BS5.875 by 3.4375 by 4.125 inches
150 by 87 by 105 mm
6 to 8 Ah (10h)120 to 1802.7 to 3.7 kgs
6 to 8 lbs
YTX12-BS5.875 by 3.5 by 5.125 inches
150 by 88 by 130 mm
10 Ah (10h)160 to 2103.1 to 4.5 kgs
7 to 10 lbs
YTX14-BS5.875 by 3.4375 by 5.75 inches
150 by 87 by 146 mm
12 to 14 Ah (10h)190 to 235 3.6 to 5 kgs
8 to 11 lbs
YTX20L-BS6.875 by 3.4375 by 6.125 inches
175 by 87 by 155 mm
14 to 20 Ah (10h)220 to 3305 to 6.4 kgs
11 to 14 lbs
YTX24HL-BS8.0625 by 3.4375 by 6.375 inches
205 by 87 by 162 mm 
21 Ah (10h)300 to 350 5.9 to 8.2 kgs
13 to 18 lbs
YTX30L-BS6.5625 by 4.9375 by 6.875 inches
166 by 126 by 175 mm
30 Ah (10h)360 to 4007.7 to 10 kgs
17 to 22 lbs
U1 & U1R7.75 by 5,1875 by 7.3125 inches
197 by 132 by 186 mm
35 Ah (20h)300 to 32010 to 11.8 kgs
22 to 26 lbs

Group U1 & U1R Battery Equivalents and Replacement Sizes Chart

Battery ModelBattery TypeBattery Chemistry20h CapacityDischarge CharacteristicsWeight in (kgs and lbs)
Deka 8AMU1RStartingAGM  –320 CCA; 45 min RC (25 Amps, to 10.5v)11.3 kgs
25 lbs
Expert Power EXP 12330Deep CycleAGM33(10h)21.09 Amps; 60 minutes, down to 10.5v10.8 kgs
23.8 lbs
Mighty Max ML35-12Deep CycleAGM37330 Amps (5 s); 17.2 Amps, 60 minutes, down to 10.5 volts10.5 kgs
23.1 lbs
MotoBatt MBU1-35Deep CycleAGM35          –11.8 kgs
26 lbs
Power-Sonic PS-12350Deep CycleAGM35350 Amps (10 s); 25 Amps, 60 minutes, down to 9 volts11.2 kgs
24.7 lbs
SigmasTek SP12-35Deep CycleAGM35      –11.2 kgs
24.7 lbs
VMAXTANKS V35-857Deep CycleAGM35300 CCA; 75 min RC (25 Amps, down to 10.5 v)11.3 kgs
25 lbs
Weize LFP1235Deep CycleAGM35(10h)350 Amps(5 s); 20.4 Amps, 60 min, down to  10.5 volts10.5 kgs
23.2 lbs
Chrome U1 BatteryDeep CycleAGM35525 Amps (5 s)10.7 kgs
23.5 lbs
Everlast 12350DC-NBDeep CycleAGM35        –10.7 kgs
23.5 lbs
Interstate Batteries DCM0035Deep CycleAGM35        –10.4 kgs
22.9 lbs
Mighty Max ML-U1-CCAHRDual PurposeAGM18(10h)320 CCA; 20 Amps, 30 min, down to 9.6 volts6.6 kgs
14.57 lbs
NPP NP12-35AhDeep CycleAGM35          –10.5 kgs
23.1 lbs
PowerStar PS12-35-DDeep CycleAGM35          –10.4 kgs
23 lbs
Universal UB12350Deep CycleAGM35315 CCA; 18 Amps, 60 min, down to 10.5 volts11.1 kgs
24.4 lbs
VMAXTANKS VPG12C-50LiDeep CycleLithium50150 Amps (3 s); 100 Amps (5 s), 50 Amps Continuously5.4 kgs
12 lbs

Why Battery Size Matters for Lawn Mowers

The battery size of your lawn mower directly impacts its power output, run time, and overall efficiency. A larger battery with higher amp-hours (Ah) provides more power, allowing you to mow longer without recharging.

However, it also increases the mower’s weight and cost, which can be challenging to manage. Conversely, a smaller battery is lighter and more affordable, but it may not last through a full mowing session, leading to interruptions.

Balancing battery capacity and voltage is key. Higher voltage means more cutting power, but it can drain the battery faster. On the other hand, a lower voltage conserves energy but might struggle with thick grass. Therefore, it’s important to consider your lawn size, terrain, and mower type when choosing the right battery size. Understanding these tradeoffs helps ensure you select a battery that meets your needs without compromising performance or convenience.

How to Determine the Right Battery Size for Your Lawn Mower

Selecting the right battery size starts with understanding your lawn mower’s specifications and your lawn care needs. First, check your mower’s manual or manufacturer’s website to find the recommended battery type, voltage, and amp-hour rating.

Next, consider your lawn size: a larger area might require a battery with higher capacity for extended run time. If you frequently mow a small lawn, a battery with a lower capacity might be sufficient and more cost-effective.

Additionally, think about your mowing habits. For frequent, heavy use, a larger battery with higher amp-hours (Ah) will provide more power and a longer runtime. However, this also means more weight and higher cost.

Conversely, a smaller battery may save on both weight and expense but might not last through a full session, leading to more frequent recharges. Balancing these factors ensures you choose a battery that fits your mower’s needs and your own convenience, optimizing performance without unnecessary expenditure.

How to Maintain Your Lawn Mower Battery for Longevity

Proper maintenance of your lawn mower battery can significantly extend its life and ensure consistent performance. Begin by regularly charging the battery according to the manufacturer’s instructions, as this helps prevent it from becoming over-discharged.

Over-discharging can damage the battery and reduce its lifespan, so avoid letting it drain completely before recharging. Store your battery in a cool, dry place to prevent damage from extreme temperatures and moisture.

If possible, disconnect the battery during long periods of inactivity to prevent self-discharge. Watch for signs of wear, such as a reduced run time or difficulty starting the mower, which indicates the battery might need replacement.

Balancing maintenance with usage is crucial. Frequent charging can be a hassle but helps maintain battery health, while neglecting it can lead to costly replacements. Proper care ensures you get the most from your battery, impacting both performance and costs.

FAQs

1. How often should I charge my lawn mower battery?

Answer: You should charge your lawn mower battery after each use, especially if it’s a lead-acid battery. For lithium-ion batteries, charging after every few uses is sufficient. Regular charging prevents over-discharge and helps extend battery life. Always follow the manufacturer’s guidelines for charging frequency and methods.

2. What are the signs that my lawn mower battery needs to be replaced?

Answer: Common signs of a battery needing replacement include reduced run time, difficulty starting the mower, or a battery that won’t hold a charge. If you notice these issues despite following proper maintenance, it may be time to replace the battery. Regularly check for any swelling or leaks as well, which indicate battery failure.

3. Can I use a different battery size than recommended for my lawn mower?

Answer: It’s important to use the battery size recommended by your lawn mower’s manufacturer. Using a different size can affect performance and potentially damage the mower. While a larger battery might provide longer run times, it can be heavier and more expensive. Conversely, a smaller battery might not provide enough power or run time, affecting your mowing efficiency. Always refer to your mower’s specifications for the correct battery size.