What battery does the Honda EU3000is use?

The Honda EU3000is typically uses a 12V 9Ah battery, often cross-referenced with the YTX9-BS part number. It is an AGM maintenance-free battery designed to fit the specific battery tray of the inverter.

How can I prevent my generator battery from dying during the winter?

The best way to maintain your Honda generator battery is to use a 12V float charger or Battery Tender. This keeps the battery at the ideal voltage while the generator is stored, preventing the lead plates from sulfating.

Honda Generator Batteries

Q: Which Honda generators require a battery?

Only Honda generators with an Electric Start feature require a battery. This includes the EU3000is, EU7000is, and many EM and EB series models. Recoil-start only models like the EU2200i do not use a battery.

Reliable Power for Your Honda Generator

Honda generators are legendary for their reliability, but even the best engine won't start without a healthy battery. Whether you are powering a remote job site with an EB series, backing up your home with an EM model, or enjoying the quiet performance of an EU3000is, Battery Mart provides the high-quality AGM (Absorbed Glass Mat) batteries you need to ensure an instant start every time.

Why Choose Battery Mart for Your Honda? Our replacement batteries are engineered to meet or exceed OEM specifications. We focus on providing:

Maintenance-Free AGM Technology: No more checking acid levels or worrying about leaks.
High Cranking Amps: Reliable starting power even in cold weather.
Vibration Resistance: Built to withstand the constant movement of a running generator.
Precision Fit: We match the exact dimensions and terminal configurations for a "drop-in" installation.

Not sure which battery your Honda needs? Check your model number against our compatibility list below or contact us for expert service.

Item #: BM-MBTX20UHD |

Motobatt MBTX20UHD 12V 320CCA AGM Battery

Item #: BM-MBTX20UHD

Voltage: 12 Volt / 21 Ah / 320 CCA

• AGM
• Dimensions: 6.89" / 3.43" / 6.1"
• Weight: 15.00 lbs
• Warranty: 1 Year

Price:
$124.95

Price: $124.95

Item #: GEL-8G-U1 |

Deka Dominator 8GU1 Group U1 Gel Battery [12V, 32Ah]

MADE IN USA

Deka Dominator 8GU1 Group U1 Gel Battery [12V, 32Ah]

Item #: GEL-8G-U1

Voltage: 12 Volt / 32 Ah

• Gel
• Dimensions: 8 5/16" / 5 1/8" / 7 1/4"
• Weight: 26.00 lbs
• Warranty: 12 Month
• See All Compatible Models

Price:
$172.95

Price: $172.95

Item #: SLA-9A51R |

DEKA Intimidator 9A51RT Group 51R AGM Battery

Backordered: Estimated Available June 25th, 2026

MADE IN USA

DEKA Intimidator 9A51RT Group 51R AGM Battery

Item #: SLA-9A51R | Backordered: Estimated Available June 25th, 2026

Voltage: 12 Volt / 46 Ah / 500 CCA

• AGM
• Dimensions: 9.31" / 5.00" / 8.63"
• Weight: 31.50 lbs
• Warranty: 30 Month
• See All Compatible Models

Price:
$224.95

Price: $224.95

Item #: AG-ATZ10-RS |

Antigravity AG-ATZ10-RS RE-START Lithium Powersport Battery

Item #: AG-ATZ10-RS

Voltage: 12.8 Volt / 10 Ah (Pb Eq) / 360 CCA

• LiFePO4
• Dimensions: 5.9" / 3.46" / 3.62"
• Weight: 4.00 lbs
• Warranty: 3 Year Factory Direct - Warranty Info (PDF)

Price:
$224.99

Price: $224.99

Item #: PC310 |

Odyssey ODS-AGM8E Extreme Powersport Battery (PC310)

Item #: PC310

Voltage: 12 Volt / 7 Ah / 100 CCA

• AGM
• Dimensions: 5.43" / 3.39" / 3.98"
• Weight: 6.00 lbs
• Warranty: 2 Year (Warranty Info)

MSRP: $312.99

Price:
See Best Price in Cart

Item #: DLITH-12V46 |

Dakota Lithium Group U1 12 Volt, 46 Ah LiFePO4 Deep Cycle Battery

Backordered: Avaiable June 28th, 2026

Dakota Lithium Group U1 12 Volt, 46 Ah LiFePO4 Deep Cycle Battery

Item #: DLITH-12V46 | Backordered: Avaiable June 28th, 2026

Voltage: 12.8 Volt / 46 Ah

• LiFePO4
• Dimensions: 7.6" / 5.1" / 6.8"
• Weight: 10.50 lbs
• Warranty: 11 Year (Factory Direct)

Price:
$399.00

Price: $399.00

Frequently Asked Questions: Honda Generator Batteries

Which Honda generators require a battery?

Only Honda generators equipped with an Electric Start feature require a battery. This includes popular models like the EU3000is, EU7000is, and most models in the EM and EB series. Smaller portable units like the EU1000i or EU2200i are recoil-start only and do not use a battery.

What is the most common battery for the Honda EU3000is?

The Honda EU3000is typically uses a 12V 8Ah or 9Ah battery. The industry-standard part number is often a YTX9-BS or equivalent. This battery is sized specifically to fit the compact internal battery compartment of the inverter unit.

How do I make my Honda generator battery last longer?

Generator batteries often fail because they sit idle for long periods. To extend your battery's life:

Use a Battery Tender: Connect a float charger during the off-season to prevent deep discharge.
Exercise the Generator: Run your generator once a month for 15–20 minutes to allow the internal charging circuit to top off the battery.
Clean the Terminals: Ensure the nut-and-bolt connections are tight and free of corrosion.

Does my battery come fully charged?

Most of our Honda replacement batteries are shipped factory-activated and fully charged. However, we always recommend testing the voltage or placing the battery on a charger for a short period before the first use to ensure it is at peak performance.