# Long 36B20R(S) · Car battery 12V 40Ah

![Long 36B20R(S) · Car battery 12V 40Ah](https://bateriasonline.es/914-home_default/long-36b20r-s.jpg)

> Long 36B20R(S): 40 Ah car battery, 197×129×227 mm. Equivalent to Long 36B20L and Long 36B20R. Price on request: ask for a free quote.

**Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Long](https://bateriasonline.es/en/long-batteries)

- **Canonical URL**: https://bateriasonline.es/en/long-36b20r-s
- **Language**: en
- **Brand**: Long
- **Reference**: BOL-LONG-36B20R(S)
- **MPN**: 36B20R(S)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Long |
| Range | Starting Series |
| Application | Cars |
| Voltage | 12 V |
| Capacity | 40 Ah |
| Length | 197 mm |
| Width | 129 mm |
| Height | 227 mm |
| Weight | 7.8 kg |

## Quick description

The Long 36B20R(S) is a car battery with 12 V and 40 Ah, measuring 197 × 129 × 227 mm.

## Description

## The Long 36B20R(S) at a glance

The Long 36B20R(S) is made for petrol and diesel cars without automatic engine stop. Its job is to start the engine in the cold with margin to spare and keep the car's electronics powered.
At 40 Ah it is a small size: the usual choice for petrol superminis and city cars with little equipment. The 36B20R(S) belongs to the Long Starting Series range. [More Long batteries](https://bateriasonline.es/en/long-batteries)

## Long 36B20R(S) vs 32B20R and 34B19L(S): which one to choose?

Torn between the 36B20R(S) and another similar Long? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Long 36B20R(S) (this one) | 40 Ah | 197 × 129 × 227 | 7.8 kg |
| Long 32B20R | 35 Ah | 197 × 129 × 227 | 6.1 kg |
| Long 34B19L(S) | 33 Ah | 197 × 129 × 227 | 6.1 kg |

- Long 32B20R: 5 Ah less, the same dimensions.
- Long 34B19L(S): 7 Ah less, the same dimensions.

## Equivalents and alternatives to the Long 36B20R(S)

These batteries share voltage, dimensions and polarity with the 36B20R(S), with similar capacity: compare cranking power, technology and price before deciding.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Long 36B20L | | 40 Ah | 197 × 129 × 227 |
| Long 36B20R | | 40 Ah | 197 × 129 × 227 |

## Check this before ordering the Long 36B20R(S)

- With 40 Ah, the 36B20R(S) replaces an original battery of that capacity or slightly less.
- The 36B20R(S) needs 197 × 129 × 227 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Long 36B20R(S)

### Long 36B20R(S) or 32B20R?

Compared with the 36B20R(S), the Long 32B20R has 5 Ah less. With 40 Ah, the 36B20R(S) runs longer between charges than the 32B20R (35 Ah). Both measure 197 × 129 × 227 mm, so they fit the same tray.

### How much does the Long 36B20R(S) weigh?

The 36B20R(S) weighs 7.8 kg. For reference, the Long 32B20R (35 Ah) weighs 6.1 kg.

### Which battery is equivalent to the Long 36B20R(S)?

With the same dimensions and polarity as the 36B20R(S) you have the Long 36B20L and Long 36B20R; choose by cold cranking power, technology and price.

### Does the new battery need to be registered in the car?

In cars with energy management (common since 2010) it is worth registering the battery in the control unit so it adjusts charging. In older cars you just connect it.

## Other options if you are unsure about the 36B20R(S)

- [More car batteries](https://bateriasonline.es/en/car-batteries)
- [Full Long catalogue](https://bateriasonline.es/en/long-batteries)
- [Long 36B20L](https://bateriasonline.es/en/long-36b20l) · 40 Ah, 197×129×227 mm
- [Long 36B20R](https://bateriasonline.es/en/long-36b20r) · 40 Ah, 197×129×227 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*