Battery groups › 102R
BCI battery group
Group 102R battery size
A BCI group 102R battery is at most 207 mm long, 175 mm wide and 139 mm tall (8.15 × 6.89 × 5.47 in), according to the Battery Council International group chart.
| Maximum size | 207 × 175 × 139 mm |
|---|---|
| In inches | 8.15 × 6.89 × 5.47 |
| Terminal types | A |
| Polarity | Reversed (R): positive terminal on the opposite side from the base group |
| Cold cranking amps (OE range) | not listed |
| DIN / EN equivalent | V4 (BCI best fit) |
Cars whose manuals point to group 102R
None of the owner's manuals this site has read so far print group 102R. Most Japanese and Korean makers print a case size or capacity instead of a BCI group, so the battery label on the car is the better guide.
Measuring for a group 102R
To take a group 102R, the tray needs at least 207 mm (8.15 in) of length and 175 mm (6.89 in) of width inside the hold-down, and 139 mm (5.47 in) of height below the hood or any bracket, with room left for the cable ends. These are BCI maximums: a real group 102R battery can be a few millimetres smaller, never larger.
Nearby sizes
| Group | L × W × H (mm) | Difference from 102R |
|---|---|---|
| 99 | 207 × 175 × 175 | 0 mm length, 0 mm width, +36 mm height |
| 99R | 207 × 175 × 175 | 0 mm length, 0 mm width, +36 mm height |
| 57 | 205 × 183 × 177 | -2 mm length, +8 mm width, +38 mm height |
| 140R | 207 × 175 × 190 | 0 mm length, 0 mm width, +51 mm height |
| 70 | 208 × 180 × 186 | +1 mm length, +5 mm width, +47 mm height |
Positive numbers mean the other group is bigger than group 102R. A bigger case only fits if your tray and hold-down have that much spare room; measure inside the hold-down frame, not the old battery.
Fitting a group 102R
The group sets the case size, terminal position and hold-down. A battery from another group can only replace it when the length, width and height all fit the tray and the terminals land on the same sides. No other passenger-car group in the BCI chart has exactly the same case size and polarity. Use the tray fit checker to list every group that fits a measured space.
Source: Battery Council International, BCI Group Sizes (Oct 2023 PDF), page 7. Checked 2026-10-20.