Mine are made in China, not Germany. Are they fakes?

They are not fake. They are just made with slave labour.

how do i fit the varta 4230 to my watchman oil sensor - the one actually in the tank?

Unscrew by hand the black sensor on the top of the tank, take it back to the plug in reader inside the house, turn off plug in reader. On the sensor undo 4 screws and gentle pull apart you will see the batteries, remember the way the old batteries go in (which way up). Replace and put together. Hold sensor and the reader together and turn on, you will see a black dot on the sensor touch that against the plug-in-reader until you get a connection. screw it back on the top of your oil tank. PS if it's raining cover the hole up on the top of your oil tank whilst your refitting the batteries. Hope that helps.

how do i fit the varta 4230 to my watchman oil sensor - the one actually in the tank?

Unscrew by hand the black sensor on the top of the tank, take it back to the plug in reader inside the house, turn off plug in reader. On the sensor undo 4 screws and gentle pull apart you will see the batteries, remember the way the old batteries go in (which way up). Replace and put together. Hold sensor and the reader together and turn on, you will see a black dot on the sensor touch that against the plug-in-reader until you get a connection. screw it back on the top of your oil tank. PS if it's raining cover the hole up on the top of your oil tank whilst your refitting the batteries. Hope that helps.

could you advise use by date?

Sorry, I just installed mine, I didn't check to see if there was one. That was about a year ago in a Roberts clock radio about 2003 vintage that came from a charity shop. It keeps the digital clock going when not plugged in. Still working

Desertcart Logo

Deliver to Ukraine

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🔋 Power your life with precision and longevity!

DECADE LONG SHELF LIFE - Stock up now, power your devices for years to come
ULTRA SLIM 20 MM DIAMETER - Fits perfectly in compact gadgets without bulk
RELIABLE 3 V LITHIUM POWER - Consistent energy output for all your essential devices
TRUSTED GERMAN ENGINEERING - 130+ years of quality and precision in every battery
VERSATILE DEVICE COMPATIBILITY - Ideal for car keys, remotes, medical devices, and more

The VARTA CR2016 is a premium 3V lithium coin battery with a compact 20mm diameter and 1.6mm thickness, engineered for reliable, long-lasting power. Manufactured with German quality standards, it guarantees up to 10 years of shelf life and supports a wide range of everyday devices including car keys, remote controls, medical instruments, and more. This pack of 5 batteries ensures you stay powered and prepared, combining trusted technology with versatile use.

Reviews

C**L

Good value and fitted perfectly

Arrived on time and used in car key fob.Worked perfectly.

26.04.2025

G**S

Reliable Seller - Safe delivery to Singapore

Reliable Seller - Good product, good delivery

21.05.2025

M**W

Varta Make Great Batteries

Excellent batteries, Varta always deliver on quality and longevity.

29.11.2023

M**L

Replaced Ford Fiesta car key battery

Works as expected.Should last as car keys don't tend to use a lot of battery capacity.

6.04.2025

N**E

Good battery for my car keys fob

Needed this replace my car keys fob and it did the job.

5.06.2025

H**N

Good purchase

15.04.2025

A**R

18.06.2025

C**E

These did not hold charge

I had to buy some more from a local shop as they didn’t last long at all.

15.02.2024

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.