MS-4021B Your info says that the lithium battery never needs replaced, yet some comments say they replaced 3 batteries. What's the truth?

I've had mine close to 15 years. It's been good. Don't recall ever having to replace the 3 LR44 button cells, but I may have. (I typically put a note with a date in the compartment when I replace batteries. No note in there.) Few days ago got the dreaded "L" display and it was not lighted. Assumed it meant low batteries, so replaced the 3 LR44s. Actually got three bright red pressure readings after that, but then nothing but L. Did some research and found out what "L" really meant. I bought a Slime 20475 which I really like. The interface with the valve stem really works... no hiss, no air loss! (There is one feature I wish it had: a bleeder valve.) One more thing about the Accutire. Like most devices that have a rubberized grip coating, after a few years or so, it'll turn to sticky, yucky goo. At that point, it's really easy to remove with denatured alcohol.

Can the batteries be replaced?

I bought my MS-4021B in 2010, and the older battery storage design is different than the current version. The older style has a single 3 volt `2032' coin battery. Replace as follows: (1) roll down the black rubber cover over the handle about half way down the handle length until 2 gray plastic tabs are visible, (2) simultaneously press on both gray tabs while pulling the black handle half away from the gray sensing half, (3) unscrew the black round piece at the sensor tip, (4) gently separate the 2 halves of the gray section, (5) gently remove the small circuit board/battery/digital display unit mounted between the 2 gray pieces, (6) using a small jeweler screwdriver, unscrew the 7 screws holding a black plastic cover over the battery, (7) pull the sticky adhesive contact attached to the top of the battery, (8) remove the old battery, (9) install the new battery + (positive) side down (touching the circuit board) and - (negative) side up (touching the sticky adhesive contact). Reassemble by performing the disassembly steps in reverse order.

Will this work on a motorcycle tire?

I have two Accutire digital tire gauges. One is designed for the motorcycle, but it is nothing different but the angle of the head. I have used both of the motorcycle and they work great. Recommended by Consumer's Reports, that is why I decided to try them. John B, 2/7/2013

Does this gauge work in cold temperature? I've had expensive digital truck gauges, for our RV, that don't work well in temps below freezing.

I used a gauge similar to this one for over 5 years with no problems. I used it during the winter months but I can't recall if the temps were ever below freezing. The manual for this gauge says the operating temp is 0-100 F. http://measurement-ltd.com/docs/MS-4021-Product-Manual.pdf

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🚗 Keep your ride road-ready with precision and style!

MULTI UNIT DISPLAY - Switch seamlessly between psi, bar, kPa, and kg/cm² to suit your preference
DUAL PACK CONVENIENCE - Two durable gauges plus 4 valve caps—ready for all your vehicles
SMART POWER MANAGEMENT - Automatic shut-off extends battery life so you’re never caught off guard
ERGONOMIC GRIP ANGLED HEAD - Rubber-coated handle and angled design for effortless, slip-free use
PRECISION AT YOUR FINGERTIPS - Accurate readings within 0.5 PSI increments for flawless tire care

The Accutire MS-4021B Digital Tire Pressure Gauge 2-Pack offers rugged, heavy-duty construction with an ergonomic rubber grip and angled head for easy handling. Featuring a large backlit LCD that displays pressure in psi, bar, kPa, or kg/cm², it delivers highly accurate readings within 0.5 PSI increments across a 5-150 PSI range. Equipped with automatic shut-off to conserve battery life and includes replaceable alkaline LR44 batteries plus 4 valve caps, this set is perfect for professional-grade tire maintenance.

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Manufacturer	Accutire
Brand	Accutire
Model	MS-4021RBK
Item Weight	5.9 ounces
Package Dimensions	9.06 x 4.17 x 1.85 inches
Item model number	MS-4021RBK
Manufacturer Part Number	MS-4021RBK

Accutire MS-4021B Digital Tire Pressure Gauge (2-Pack) with 4 Valve Caps, 5-150psi (psi, bar, kPa, kg/cm2) (2 Black Units)

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