would this cage be ok for holding a battery on a Ebike conversion..?

I holds a 1.5L Nalgene water bottle, which is about 3.3lbs. Four pounds would probably be okay, but most eBike batteries weigh considerably more.

what is the spacing of the holes for attaching to the bike? my bike has holes 5.5 inches apart, which is larger than the standard hole sizing.

Max spacing of existing drilled holes is 3.75 inches. However - overall length of drilled surface is 6.75 inches. So there is room enough to drill another hole in the bracket or consider adding a Wolf Tooth B-RAD 3 or 4.

would this fit two msr 30oz fuel bottles?

I'm reluctant to say NO outright, because where there's a will, there's a way. However the bottles you mention are about 3-inch diameter each, while the cage is about 4-inches across. Thus the cage will not cradle 2 bottles of that diameter side-by-side snugly. I would not buy it for that purpose. The cage does work well for single larger diameter flasks and bottles that will nest between the side rails.

Is it a blayblad are a cup holder

It has seven platypus cupholders.

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Description

🚴‍♂️ Gear up and never leave essentials behind!

SLEEK BLACK FINISH - Updated matte black design complements any bike style with a professional, stealthy look.
LIFETIME CONFIDENCE - Backed by Blackburn’s limited lifetime warranty, ride worry-free knowing your gear is protected.
SECURE CARGO STRAPS - Integrated straps lock down odd-sized bottles, bags, or clothing—carry more without compromise.
LIGHTWEIGHT YET TOUGH - Crafted from durable metal weighing just 4 ounces, it balances strength with minimal added weight.
UNIVERSAL FRAME COMPATIBILITY - Three sets of mounting holes adapt seamlessly to various bike frames, ensuring a perfect fit every ride.

The Blackburn Outpost Cargo Water Bottle Cage is a versatile, metal cycling accessory designed to securely carry bulky items and odd-sized bottles. Featuring three sets of mounting holes for universal frame compatibility and included straps for extra security, it combines lightweight durability with a sleek black finish. Perfect for the active cyclist who demands both function and style, it comes with a limited lifetime warranty for lasting peace of mind.

Specifications

Color	Black (Updated)
Material	Metal
Brand	Blackburn
Product Dimensions	22"L x 4"W x 20"H
Manufacturer	Blackburn
Automotive Fit Type	Universal Fit
UPC	196178238489
Item Package Dimensions L x W x H	8.58 x 5.08 x 2.99 inches
Package Weight	0.16 Kilograms
Item Dimensions LxWxH	12 x 6 x 4 inches
Item Weight	4 Ounces
Brand Name	Blackburn
Warranty Description	Subject to a limited lifetime warranty for the lifetime of the original purchaser. This warranty does not apply to damage due to heat, physical damage resulting from abuse, neglect, improper repair, improper fit, improper installation, improper care, accidents, failure to follow directions, alterations, misuse or use unintended by the manufacturer. Nor does it cover minor cosmetic damages due to normal "wear and tear" of the product.
Model Name	Blackburn Outpost Cargo Water Bottle Cage (Black, One Size) (Updated)
Suggested Users	unisex-adult
Number of Items	1
Part Number	BLBCOUT
Model Year	2018
Included Components	Bottle Cage
Size	One Size
Sport Type	Cycling

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