FAQs
Questions usually asked
Common questions about battery fitment, ratings and battery types. Contact Rocket Battery for anything specific to your vehicle or equipment.
How do I know which battery fits my vehicle?
Fitment comes down to three things: the group size, which sets the physical dimensions and case shape; the terminal type and position; and the cranking rating your vehicle calls for. Share your make, model, year and engine, or the number printed on your current battery, and the Rocket Battery team can help identify suitable options.
What is the difference between CA and CCA?
Both measure cranking current, but at different temperatures. Cranking Amps (CA) are measured at 0 degrees Celsius, Cold Cranking Amps (CCA) at minus 18 degrees Celsius. Because CCA is measured in colder conditions it is always the lower of the two figures for the same battery, and it is the more useful rating for Saskatchewan winters.
What is the difference between a starting and a deep-cycle battery?
A starting battery delivers a short burst of high current to crank an engine, and the alternator recharges it almost immediately. A deep-cycle battery uses thicker plates so it can be discharged well down and recharged repeatedly, which suits trolling motors, RV house systems and auxiliary power. Some applications use a dual-purpose battery that does both. Running a starting battery on deep-cycle duty will shorten its life.
What is an SLA or gel battery, and where is it used?
SLA stands for sealed lead-acid. The electrolyte is immobilised, either absorbed into a glass mat or set as a gel, so the battery is sealed, spill-proof and never needs topping up with water. Most can be mounted in any orientation. They are common in golf carts, floor machines, mobility equipment, alarm and security panels, UPS backup and powersports. Rocket Battery lists both 6 volt and 12 volt options.
How can I check availability and pricing?
Stock and pricing change, so neither is listed on the site. Send your vehicle or equipment details through the battery finder, or call the store, and the team will come back to you. Please contact Rocket Battery to confirm availability, pricing, services, or current policies.
What is a group size, and where do I find mine?
The group size is a standard code that describes the battery’s physical dimensions and terminal layout, for example Group 24, 27 or 49. It is printed on the label of your current battery and listed in your owner’s manual. Two batteries with the same group size will fit the same tray, but they can still differ in cranking rating.
Can I fit a battery with a higher CCA than my vehicle specifies?
Usually yes. A higher cold cranking rating gives you more starting power in cold weather and will not harm the charging system, provided the group size, terminal type and terminal position still match. Going below the specified rating is the change to avoid.
Does terminal position matter?
Yes, and it is the most common reason a correctly sized battery will not fit. Positive and negative posts can be reversed between otherwise identical batteries, and the cables will not reach if they are on the wrong side. Check the layout of your current battery before ordering.
The part number on my battery does not match anything in the listings. What now?
Part numbers vary between manufacturers, so a direct match is not always possible or necessary. Send us a photo of the label along with the vehicle or equipment details and we will identify an equivalent.
How should I store a battery over the off-season?
Charge it fully first, disconnect it, and keep it somewhere cool and dry rather than freezing. Check the charge every month or two and top it up, because a battery left flat for a long period can suffer permanent capacity loss.