Optima
Optima BTSLI-4.2 · Boat battery 12V 50Ah 815A
Reference: BOL-OPTIMA-BTSLI-4.2 · EAN 4016987113493
The Optima BTSLI-4.2 (ETN 806 252 000, also written 806252000) is a boat battery with 12 V, 50 Ah and 815 A cold cranking current, measuring 254 × 175 × 200 mm, with the positive terminal on the left.
Optima BTSLI-4.2 · Boat battery 12V 50Ah 815A images
- Voltage
- 12V
- Capacity
- 50Ah
- Cold cranking amps (EN)
- 815A
- Technology
- Spiral AGM
- Dimensions (L × W × H)
- 254 × 175 × 200 mm
- Polarity
- Positive terminal on the left
Price:
€177.59
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VAT included. The exact shipping cost is shown in the cart before you pay.
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For Spain, Portugal, France, Germany, Italy, Belgium and the Netherlands you see the exact cost before paying. For the rest of Europe we send you a shipping quote, with no obligation.
14 days to return your order
If it does not fit, you have 14 days from delivery to return it unused.
Where the Optima BTSLI-4.2 fits
The Optima BTSLI-4.2 is made for marine use. Fit the BTSLI-4.2 securely on board and away from bilge water.
The BTSLI-4.2 belongs to the Optima OPTIMA BLUE TOP range. See all Optima batteries
Spiral AGM technology in the BTSLI-4.2
Inside, the BTSLI-4.2 rolls its plates into cylindrical cells (spiral AGM). It is the basis of OPTIMA batteries.
Optima BTSLI-4.2 vs BTDC-4.2 and BTDC-5.0: which one to choose?
Torn between the BTSLI-4.2 and another similar Optima? This is what changes:
| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Optima BTSLI-4.2 (this one) | 50 Ah | 815 A | 254 × 175 × 200 | left | 18.4 kg |
| Optima BTDC-4.2 | 55 Ah | 765 A | 254 × 175 × 200 | left | 20.6 kg |
| Optima BTDC-5.0 | 66 Ah | 765 A | 309 × 172 × 221 | left | 24.4 kg |
- Optima BTDC-4.2: 5 Ah more, 50 A less cranking power, the same dimensions.
- Optima BTDC-5.0: 16 Ah more, 50 A less cranking power, a different case (309 × 172 × 221 mm).
Equivalents and alternatives to the Optima BTSLI-4.2
No other reference in the catalogue fully matches the dimensions and polarity of the BTSLI-4.2; you will find the closest ones among our marine and boat batteries.
Optima BTSLI-4.2 codes and part numbers
This is how the Optima BTSLI-4.2 appears on the label and in parts catalogues:
| Commercial reference | BTSLI-4.2 |
|---|---|
| ETN code | 806252000 (also 806 252 000) |
| EAN | 4016987113493 |
| Case size according to Optima | 34 (BCI) |
| Base hold-down | B00 |
| Terminal type | 1 & 21 |
| Also known as | Optima 806252000 · Optima 806 252 000 |
Check this before ordering the Optima BTSLI-4.2
- The BTSLI-4.2 delivers 815 A cold cranking (EN standard); do not go below what your original battery states.
- With 50 Ah, the BTSLI-4.2 replaces an original battery of that capacity or slightly less.
- The BTSLI-4.2 has the positive terminal on the left: compare it with your current battery.
- The BTSLI-4.2 needs 254 × 175 × 200 mm of space: measure it with the hold-down clamp in place.
Frequently asked questions about the Optima BTSLI-4.2
Optima BTSLI-4.2 or BTDC-4.2?
Compared with the BTSLI-4.2, the Optima BTDC-4.2 has 5 Ah more and 50 A less cranking power. The BTSLI-4.2 cranks harder; the BTDC-4.2 is only a good option if your original battery says 765 A or less. Both measure 254 × 175 × 200 mm, so they fit the same tray.
What is the ETN code of the Optima BTSLI-4.2?
806252000, also written 806 252 000. The ETN (European Type Number) is printed on the label and used in parts catalogues.
How much does the Optima BTSLI-4.2 weigh?
The BTSLI-4.2 weighs 18.4 kg. For reference, the Optima BTDC-4.2 (55 Ah) weighs 20.6 kg.
Which side is the positive terminal on the Optima BTSLI-4.2?
The BTSLI-4.2 has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.
More batteries to compare with the BTSLI-4.2
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