What type of battery goes in this?

There's no battery for this. No moving parts and no electronics.

Do refractor telescopes need collimating ?

No refractors do not need collimation

Will this work on a Bushnell North Star? I believe it is a 3.5 maksutov type.

No it will not work as your scope is a Mak-Cass type of scope... You have a cover plate on the front glass aperture, your collimation is corrected using the screws located under the corrector plate. You have to do a slightly off focus star adjustment, the star should look like a concentric set of rings within each other when collimated properly.http://uncle-rods.blogspot.com/2009/07/zen-and-art-of-telescope-collimation.html

Will this work on Celestron PowerSeeker 114EQ?

Hi! The Collimation Eyepiece will work for your telescope. Your telescope takes 1.25 inch eyepieces which the collimation Eyepiece is made for.

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Celestron Cheshire Collimation Eyepiece for Reflector & SCT Telescopes

Product ID: 440408

Details

Brand
Celestron
Compatible Devices
Telescopes or
Eye Piece Lens Description
Plossl
Focus Type
Manual Focus
Global Trade Identification Number
Item Weight
0.3 Pounds

🎯Precision collimation for Newtonians

🔍Fits standard 1.25" focusers/diagonals

⚙️Manual focus with thin crosshairs

$113.39

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Description

🔭 Align Like a Pro, See Like a Star

UNIVERSAL 1 25 FIT - Seamlessly integrates with most standard focusers and diagonals
TRUSTED BY ENTHUSIASTS - Top 20 best-seller with 4.5-star rating and growing community
EFFORTLESS VISUAL GUIDANCE - Thin crosshairs and small aperture simplify perfect alignment
PINPOINT PRECISION ALIGNMENT - Achieve flawless Newtonian telescope collimation every time
ENHANCED ACCURACY OVER BASICS - Outperforms simple collimation tools for pro-level results

The Celestron 94182 Cheshire Collimation Eyepiece is a precision tool designed for accurate alignment of Newtonian and Schmidt-Cassegrain telescopes. Compatible with 1.25" focusers and diagonals, it features manual focus with thin crosshairs for easy, reliable collimation. Rated 4.5 stars and ranked #19 in telescope eyepieces, it offers superior accuracy compared to basic collimation tools, making it a must-have for serious amateur astronomers.

Specifications

ASIN	B00009R7RJ
Additional Features	Precise Collimation for Newtonian Telescopes
Best Sellers Rank	#19 in Telescope Eyepieces
Brand	Celestron
Built-In Media	Collimation Eyepiece 1.25 in
Compatible Devices	Telescopes with 1.25" focusers or diagonals
Customer Reviews	4.5 4.5 out of 5 stars (622)
Eye Piece Lens Description	Plossl
Focus Type	Manual Focus
Global Trade Identification Number	00050234941822
Item Weight	0.3 Pounds
Manufacturer	Celestron
Manufacturer Part Number	94182-CGL
Model Number	94182-CGL
Mount	Equatorial Mount
Objective Lens Diameter	25 Millimeters
UPC	050234941822
Unit Count	1.0 Count
Warranty Description	one year limited warranty

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