What are the dimensions of each of the sizes offered?

From Amazon: Product Dimensions 24.5 x 12.5 x 13 inches Item model number HM408 NOCO has a spec sheet available on their website.

I have an ebike with an 18 inch long lithium battery. Would it be safe to store in this box?

This box will not withstand a lithium battery fire. It is recommended to store the batter in a flame retardant box (metal cabinet) or bag. Also do not store the battery fully charged if you can avoid it ( chargers have a storage mode). Anyway the most important things is to never leave it unattended when charging

4D box; 13 x 13 x 13.5 inches is what they list for dimension. Is that right? I need to know what the length and width are at the bottom mount plate?

Internal and external dimension diagrams are detailed on the product page here: https://no.co/hm408

Do you see a box for two 4D batteries?

I wasn't looking for 4D battery boxes so I don't know. Sorry

Noco Hm408 4d Commercial Grade Battery Box

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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RM1475

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up with confidence — the ultimate fortress for your 4D battery!

VERSATILE COMPATIBILITY - Perfectly sized for 4D automotive, marine, RV, and commercial batteries—your all-in-one power solution.
OPTIMIZED BATTERY SAFETY - Integrated acid reservoir and water-resistant design protect your battery and surroundings from damage.
SUPERIOR VENTILATION SYSTEM - Full flow vents release harmful battery gases, keeping your equipment safe and compliant with USCG & ABYC standards.
RUGGED COMMERCIAL GRADE BUILD - Engineered to endure extreme conditions down to -40°F and resist acid, oil, gas, and UV exposure.
SECURE HASSLE FREE INSTALLATION - Four corner fastening system with captive lid ensures a rock-solid, no-fuss setup every time.

The NOCO HM408 4D Commercial-Grade Battery Box is a heavy-duty, weather-resistant enclosure designed to securely house group 4D batteries. Featuring a rugged design with four corner fasteners, captive lid, large cable entry points, and full flow ventilation, it ensures optimal battery safety and performance in harsh environments. Certified to meet USCG and ABYC standards, it’s ideal for marine, RV, trailer, and commercial applications.

Specifications

ASIN	B002WCUR0M
Best Sellers Rank	#50,914 in Automotive ( See Top 100 in Automotive ) #42 in Automotive Replacement Battery Trays
Brand	NOCO
Customer Reviews	4.6 4.6 out of 5 stars (203)
Date First Available	June 29, 2004
Exterior	Per Item Description
Item Weight	7.7 pounds
Item model number	HM408
Manufacturer	NOCO
Manufacturer Part Number	HM408
Model	HM408
OEM Part Number	HM408
Product Dimensions	24.7 x 9.6 x 14 inches
Special Features	Battery Box for 4D Batteries, Captive Lid Hold-Down, Four Corner Fastening System, Full Flow Ventilation
Voltage	12 volts

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