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While most push lawn mowers are pull-started, a couple of walk-behind and nearly all self-propelled, riding lawn mowers feature electric starting, which renders it simpler to begin their larger engines. Similar to batteries in cars and trucks, the lawn mower battery makes this convenience possible. With proper use and maintenance, a typical battery could last three or 4 years, perhaps much longer in a warmer climate. Still, the will ultimately corrode or sulfate, gradually suffering diminished power output, capacity to keep a charge and ability to start.

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Then, the starter solenoid can not even click once it comes time come mow the lawn, which means you’ll should replace your lawn mower battery. Fortunately, most lawn mower batteries fall into the 12 V group U1 format, standardized by BCI (Battery the supervisory board International), but they aren’t all the same. There space two main qualities that you need to match up to ensure the lawn mower starts and also charges reliably: terminal position and cranking amps.

Terminal Position

Group U1 lawn mower batteries come in 2 varieties, U1L and U1R, which refer to terminal position. Group U1L lawn mower batteries function the positive (+) terminal close to the left corner, on optimal of the battery, while group U1R batteries function the optimistic terminal close to the best corner.

While the internal building of U1L and U1R battery is identical, the terminal place is an important to the battery’s installation and connection come the lawn mower’s electrical system. Installing a U1L battery in a lawn mower that requires a U1R battery may be impossible, together the cables may not with the terminals, and “stretching” the battery cable can lead come chafed insulation and also a dangerous quick circuit problem. Choose a battery designed to fit the lawn mower in question.

Cranking Amps

Larger engines space harder to turn, which renders battery output another an essential factor in selecting a new battery. Battery output is measure in CCA (cold-cranking amps), which explains the quantity of existing the battery can deliver in 30 secs at 0 levels F, there is no dropping listed below 7.2 V. Choose a brand-new battery v at least the specified CCA compelled by the lawn mower manufacturer.

Choosing a mower battery through too short a CCA could not start the engine in ~ all, or, if it deserve to start the engine, it might overtax the battery’s own construction and also wear it the end faster. ~ above the various other hand, a battery through a greater CCA will have no problems starting a smaller engine, however it won’t administer any added benefits.

Choosing the suitable power rating for your battery is essential to keep your machine running properly — and also your lawn trimmed come perfection — for years come come.

Check out all of the batteries available on NAPA digital or trust among our 17,000 NAPA AutoCare locations for routine maintenance and repairs. For an ext information on choosing the best lawn mower battery, chat through a knowledgeable skilled at your local NAPA AUTO components store.

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