Picking the wrong battery for your tractor means a unit that won’t fit the tray, won’t crank in the cold, or won’t last a season. This guide gives you a clear Mahindra tractor battery size chart organized by model, plus the few rules you need to match voltage, cranking power, and physical fit on the first try. You’ll get the specs up front, then short answers to the questions owners ask most before they buy.
Quick Mahindra Tractor Battery Size Chart
Start here. The table below combines values stated across the official source material reviewed for each model. In some cases, Ah and CCA come from different official documents for the same tractor.
| Model | Voltage | Ah | CCA | Group Size / Cross-Ref |
|---|---|---|---|---|
| eMax 20S | 12V | 45 | 450 | — |
| eMax 22L / 25L | 12V | 50 | 450 | — |
| Max 26XLT | 12V | — | 450 | 51 |
| 1626 | 12V | — | 540 | 58 |
| 1635 / 1640 | 12V | — | 925 | 31 |
| 2638 / 2645 | 12V | 80 | 800 | — |
| 2660 / 2670 | 12V | 100 | 925 | — |
| 4540 / 4550 4WD | 12V | 96 | — | 31 |
| 5100 (45/55 HP) | 12V | 96 | 925 | — |
| 6065 4WD Cabin | 12V | 104 | 925 | — |
A dash (“—”) means the value was not stated in the source reviewed for that field. It does not mean zero, and it does not mean “not applicable.”
How Do You Use This Chart?
Match in this order, and you’ll avoid almost every common error:
- Voltage first. Every model here is 12V. The replacement must be 12V too.
- CCA next. Meet or exceed the cold cranking amps your model lists.
- Group size and fit. Confirm the case size, terminal position, and hold-down style.
- Ah, as context. Treat amp-hours as a capacity reference, not a CCA substitute.
If your model lists Ah but not CCA, use the amp-hour figure to compare capacity. Do not convert it into a CCA number.
What Do Voltage, CCA, Ah, and Group Size Mean?
These four values do different jobs, and none replaces another.
- Voltage is the electrical system match. Get this wrong, and nothing works.
- CCA (Cold Cranking Amps) is the burst of current to start a cold engine. Diesel tractors need a strong number here.
- Ah (Amp-Hours) is the capacity, or how long the battery runs accessories before it drains.
- Group Size is the physical standard: case dimensions, terminal layout, and hold-down points.
A battery can have the right CCA and still be useless if the group size will not fit the tray. Fit matters as much as numbers.
Why Do Some Specs List Ah and Others CCA?
You may have noticed the chart shows Ah for some models and CCA for others, and in a few cases, it shows both. This comes down to how different official spec sheets are written, not necessarily a difference in the batteries themselves. Some documents lead with capacity. Others lead with starting power.
That is why a model like the eMax 20S can show 45 Ah in one official source and 450 CCA in another. The same pattern appears in larger models, where one document emphasizes capacity while another emphasizes cranking performance. When both values are available from official material, showing both gives the clearest buying reference.
How Do You Choose a Replacement Battery?
Once you know your numbers, work through fit and condition.
- Match voltage, then meet or exceed the listed CCA.
- Confirm the group size and that the terminals sit on the correct side.
- Check tray clearance and that the hold-down bracket still secures the case.
- If the listed group size is a cross-reference rather than an officially published value, verify the case dimensions before ordering.
A worn-out battery that cranks slowly or dies overnight is the most common starting problem, and a fresh 12V heavy-duty battery in the correct size restores reliable cold-morning starts. If the engine cranks fine but the battery keeps draining while you run, the charging side is the suspect. A correctly rated alternator brings the system back to a steady charge. Loose or corroded connections cause the same slow-crank symptoms, and a clean set of battery cables with tight terminals often fixes a problem people blame on the battery itself.
On chemistry, keep it practical. Flooded and AGM batteries both work as long as the specs and fit match. AGM resists vibration well and needs less maintenance, which suits rough field use. Just confirm your charging setup and follow the maintenance guidance for the type you pick.
Battery Sizes by Mahindra Series
Reading the chart by series helps you spot the pattern for your machine.
- eMax (sub-compact): Smaller 12V batteries around 45 to 50 Ah, with published CCA around 450.
- Max / 1600 series: Mid-size units where sources often lead with CCA, from 450 to 925 depending on model.
- 2600 series: Larger batteries with published capacity from 80 to 100 Ah and CCA from 800 to 925.
- 4500 / 5100 series: Heavier-duty machines around 96 Ah, with 925 CCA documented on some models.
- 6000 cabin models: Higher-capacity batteries around 104 Ah in one official source, with 925 CCA documented in another.
The pattern is steady: as engine size and electrical load climb, capacity and cranking power rise with them.
Can You Use a Higher-CCA Battery?
Yes, in most cases. A battery with more CCA than your model requires is generally fine, as long as it stays 12V and fits the tray. Extra cranking power gives you a margin in cold weather and does no harm. The limits are physical: voltage must stay correct, and the group size, terminals, and hold-down must still match. More CCA never means you can ignore fit.
What Are the Common Replacement Mistakes?
“I bought it by CCA alone, and the battery wouldn’t fit the tray.” This is the single most common buying error, and it’s avoidable.
Watch for these:
- Buying on CCA only and ignoring group size.
- Overlooking the terminal position, so the cables won’t reach.
- Assuming every Mahindra uses the same battery. They don’t.
- Treating a cross-referenced group size as guaranteed without checking the tray.
- Ignoring model-year and configuration differences.
How Do You Find the Battery Label?
Before ordering, confirm what’s actually in your machine:
- Open the hood or battery compartment.
- Photograph the label on the current battery.
- Note the voltage, CCA, Ah, part number, and terminal layout.
- Compare it against your manual and this chart before you buy.
A two-minute check here saves a return and a delayed job.
Frequently Asked Questions
What size battery does a Mahindra tractor use? All models in this Mahindra tractor battery size chart run on 12V. Capacity ranges from about 45 Ah on smaller eMax models to 104 Ah on larger cabin-equipped models in the reviewed material.
What battery does a Mahindra eMax 20S use? A 12V battery rated at 450 CCA, with 45 Ah documented in a separate official source. Confirm the physical size from the battery label before ordering.
What CCA does a Mahindra 1635 need? The reviewed material lists 925 CCA.
Are Mahindra tractor batteries all 12 volt? Yes, every model listed here uses a 12V system.
How do I find the right battery for my model? Match voltage, meet the CCA, then confirm group size and fit using the label and your manual.
Conclusion
Use this Mahindra tractor battery size chart to match voltage and CCA, then confirm group size and fit before you order. The most reliable method is to use the published model specs as a starting point and verify the battery label in your tractor before buying. When you need replacement parts that match your machine, we keep a vast inventory of quality batteries, alternators, and starting components at affordable prices, with wide compatibility across many heavy equipment brands. Check FridayParts to find the right fit for your tractor.
