Interstate Lawn Mower Battery 12V: SLA1155 35Ah
The Interstate SLA1155 is a 12V 35Ah sealed AGM battery with flag terminals. Interstate classes it as general purpose, and retail listings and reviews also point to lawn mower use. It measures 196 mm long and weighs about 22 lb.
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Will This Battery Fit Your Mower?
A 12V rating alone does not guarantee a fit. Compare the SLA1155 with your old battery and your mower manual, then run this quick check.
The SLA1155 technical sheet lists no CCA rating and no battery group size. Its 330A figure is a 5-second discharge current, which is a different test from cold cranking amps. If your mower states a minimum CCA, confirm starting suitability before you order.
Interstate SLA1155 Specifications
| Property | Detail |
|---|---|
| Brand / model | Interstate Batteries SLA1155 |
| Classification | General purpose |
| Chemistry | Lead-acid, AGM (VRLA), rechargeable |
| Maintenance | Maintenance-free, sealed |
| Nominal voltage | 12 V |
| Nominal capacity | 35 Ah (10-hour rate, 1.75 V per cell) |
| Terminal type | Flag |
| Case material | ABS |
| Length | 196 mm |
| Width | 131 mm (5.16 in) |
| Case height | 159 mm (6.26 in), without terminals |
| Height with terminals | 180 mm (7.09 in) |
| Weight | 10.03 kg (22.11 lb), ±5% |
| Internal resistance | 8 mΩ at 25°C |
| 5-second discharge current | 330 A (not a CCA rating) |
| Cold cranking amps (CCA) | Not published |
| Float charge voltage | 13.5–13.8 V |
| Cyclic charge voltage | 14.4–14.8 V |
| Max charge current | 9.9 A |
| Recommended charging temp. | 0°C to 50°C (32°F to 104°F) |
| Recommended discharge temp. | −15°C to 50°C (5°F to 122°F) |
| Recommended storage temp. | 10°C to 25°C (50°F to 77°F) |
| Operating temperature range | −40°C to 60°C (−40°F to 140°F) |
| Warranty | 1-year limited, as listed by a retailer |
Values come from the Interstate SLA1155 technical sheet (dated 6/19) and a retailer listing. The sheet prints the length as 196 mm and 7.75 in, which are not exact equivalents. Warranty terms can differ by retailer, so check them at purchase.
SLA1155 Replacement Difficulty
When the new battery matches the old one, the swap is a basic job: two cables, one hold-down and a 22 lb battery. The harder part is confirming the fit and the starting needs. Tap a slice to highlight it.
- 15% Reaching the battery
- 15% Lifting the 22 lb battery
- 45% Confirming fit and starting needs
- 25% Matching terminals & polarity
The score and effort split are an editorial estimate based on the battery’s weight, flag terminals and a standard disconnect order. They are not an official rating or a measured install test. Access to the battery varies by mower, and corroded cables or a different terminal layout raise the difficulty.
How to Replace a 12V Mower Battery
This is a general sequence for a single 12V battery. Your mower manual comes first. Tap each step to tick it off as you go.
- 1Prepare the mowerPark on level ground, switch off, remove the key and let the engine cool. Wear eye protection and gloves.
- 2Note the layoutPhotograph the cable routing and check the + and − marks on the old battery, not only the cable colors.
- 3Disconnect the old batteryRemove the negative (−) cable first, then the positive (+) cable.
- 4Swap the batteriesRelease the hold-down and lift out the old battery. Set the SLA1155 in the tray with the same terminal orientation.
- 5ReconnectSecure the hold-down, then connect the positive (+) cable first and the negative (−) cable last.
- 6Check and recycleConfirm polarity and a firm mount, then test the mower. Take the old battery to a recycling point.
Use a 12V charger that supports AGM batteries. The SLA1155 sheet lists 14.4–14.8 V for cyclic charging, 13.5–13.8 V for float charging and a 9.9 A maximum charge current.
Other Devices Linked to the SLA1155
Retail listings and product reviews mention these uses for the SLA1155. None is a guaranteed fit. Check voltage, size, terminals and charger needs in your device manual first.
- Lawn mowersCheck CCA and fit first
- Mobility scootersCheck battery count and size
- WheelchairsCheck your manual
- UPS backup unitsCheck pack voltage and charger
- Emergency lightingCheck size and terminals
- GeneratorsCheck the role of the battery
Safety, Storage & Disposal
Lead-acid batteries can release gas while charging. Charge in a ventilated space, keep sparks and flames away, and wear eye protection when handling the battery.
- Disconnect negative first and reconnect it last.
- Keep metal tools away from both terminals at the same time.
- Charge only within the listed voltage and 9.9 A limit.
- Store at 10°C to 25°C when possible.
- Recycle old batteries at a collection point, not in household trash.
Interstate SLA1155: FAQ
Is the Interstate SLA1155 a lawn mower battery?
Interstate classes it as a general-purpose 12V 35Ah AGM battery. It can work as a mower replacement only when the mower’s voltage, size, terminals, polarity and starting needs match.
What is the CCA rating of the SLA1155?
No CCA rating is published on the technical sheet. The sheet lists 330A for a 5-second discharge, which is a different test and not a CCA figure.
Does it need water or acid top-ups?
No. It is a sealed, valve-regulated AGM battery that is specified as maintenance-free.
What charger should I use?
Use a 12V charger that supports AGM batteries. The sheet lists 14.4–14.8 V for cyclic charging, 13.5–13.8 V for float charging and a 9.9 A maximum charge current.
Is the SLA1155 the same as the SLA1156?
No. Both are 12V 35Ah models, but retailer listings identify the SLA1155 as flag-terminal and the SLA1156 as an insert-terminal version.
How should I dispose of the old battery?
Do not put it in household trash. Take it to a battery recycling point or a retailer that accepts used lead-acid batteries.
