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Read on Trustpilot →Brand: RELION
The Relion RB36V40 is a 36V 40Ah lithium deep cycle battery.
Only 4 left in stock — order soon
No hidden fees — Shipping and tax included in the price.
We accept major cards and digital wallets. Additional installment plans, when available, are offered by Shopify at checkout based on order eligibility.
Not sure it fits your vehicle?
Email info@trybeepbeep.com with this part and your vehicle’s year, make, model, trim and engine. We check fitment before you order — replies within 24–48 hours.
Why shop with us
The RB36V40 is a 36V lithium iron phosphate battery made for marine environments.
Its design is durable, ensuring longevity, while the setup in parallel allows for easy installation and increased capacity, giving you more time on the water.
Max voltage is achieved with minimum hassle thanks to the RB36V40’s parallel setup.
The improved connectors and small footprint make installation on-board a breeze, while the low weight of the battery means you’ll never sacrifice speed through the water.
The parallel setup means quicker and easier charging, but it also means there’s more in the tank when you need it.
The RB36V40 offers 20% greater capacity than its equivalent in the series*, translating to run times that keep you out on the water for longer.
*Based on 3 @ 40Ah in parallel vs 3 @ 12V 100Ah in series.
The RB36V40 is built for the marine environment.
You'll get peace of mind year-round with the newly enhanced case, featuring an IP67 waterproof rating, and a new glue channel and screw-latched enclosure to protect against airborne contaminants.
The battery’s increased capacity, faster charge time, and reduced downtime and maintenance costs make it suitable for commercial use in floor cleaning settings.
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Read on Trustpilot →About 36V Relion RB36V40 40Ah Lithium Deep Cycle Battery
Nominal Voltage: 38.4 V
Nominal Capacity: 40 Ah
Capacity @ 25A: 96 min
The UPC/barcode for this product is 00850044617623.
Orders ship within the USA directly from our authorized U.S. distributor and brand warehouses.
Orders ship within 1-2 business days and typically arrive within 4-5 business days via free standard shipping -- usually by Nov 20.
Yes -- this item can be returned within 15 days of delivery for a free return by mail. See our return policy for full details.