Lawn Mower Battery size guide (with easy to use size charts)

Is it just about the right time for you to replace your lawn mower battery? Or maybe it’s the lawn tractor battery that needs replacement? For all internal combustion engines, there must be a battery to help crank or start the engine before it gets to work. Most people find it difficult to determine the right size of small engine batteries, the right dimensions, and other properties of the battery that matter when it comes to buying a new battery. Check the specifications on your Lawn Mower of tractor to determine the correct battery in the below lawn mower battery size charts.

The Battery Council International (BCI) has standardized lawn mower batteries into the 12-Volt batteries group U1 format but even with that in mind, these batteries will still differ in other battery characteristics.

To be on the safe side while choosing the right size of your lawnmower, there are two other battery properties that need to match your engine specifications and that is; the cold-cranking amps and the battery terminal position of the battery in lawnmowers i.e the position of the positive terminal and the negative battery terminal with respect to the battery cables.

If you need to replace your Lawn Mower Tires, check the Tires Size Chart here

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
Lawn Mower Battery size by Group and units with 7 of the most common heavy duty battery  case sizes and specs.
Lawn Mower Battery size by Group and units


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

Even though the basic battery like lead-acid batteries are still available in the market, there are other battery technologies like lithium batteries, the AGM, and gel-cell batteries (Absorbed Glass Mat is an advanced technology  lead-acid battery) with no battery maintenance due to vibration resistance 

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

How to choose the best lawn mower battery size?

What’s the best Lawn Mower Battery Size for my Machine?

Remember something when choosing the right battery size when considering the cold-cranking amps, going below the recommended CCA will reduce the minimum expected battery life while at the same time going for a higher CCA rating has no practical advantage in any way and it might actually mess with the battery management system. The best choice would be to stick to the stipulated cold-cranking amps battery. 

Lawn Mower Battery sizes and replacement explained

Does Lawn Mower Battery Size matter? Yes it does, by RedneckComputerGeek

Conclusion

Depending on the battery age, which for most batteries will go up to 3 or 4 years, the battery output after a period of time starts to drop. Other factors like battery acid spill, extended storage periods without using the lawnmower especially during cold temperature seasons or battery storage in sub-freezing temperatures, vibration damage with wet cell batteries, all these factors may negatively impact the general battery condition forcing you to go for a quick replacement.

A full understanding on battery sizes charts you can read here

To get improved performance with ample power from your battery, just remember the battery tips provided in this article regarding batteries – exact battery size i.e the physical size as well as matched-up battery properties as recommended by the lawnmower manufacturer.

If you enjoyed reading this article, please don’t hesitate to leave a comment below!

Picture in this post by Clayton Cardinalli on Unsplash

Related House and Garden Size Charts

House Size Chart, Topics

Leave a Reply

Your email address will not be published. Required fields are marked *