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

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

VARTA Batteries Electronics CR2025 Lithium button cell 3V battery 5-pack, Button cells in original blister pack of 5

VARTA Batteries Electronics CR2025 Lithium button cell 3V battery 5-pack, Button cells in original blister pack of 5

Product ID: 48124915

Details

Battery capacity
170
Battery cell composition
Lithium
Brand
VARTA
Number of batteries
5 Lithium
Recommended uses for product
Medical Car

⏳10-year guaranteed shelf life

📏20mm diameter x 2.5mm depth

🔋3V lithium power

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

$11.03

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Description

🔋 Power your life, don’t let your devices run out of juice!

MULTI DEVICE MASTERY - Perfect for remotes, car keys, medical devices, sensors, and more—stay powered across your tech ecosystem.
TRUSTED BRAND QUALITY - VARTA’s premium manufacturing means reliability you can count on for everyday and critical use.
PRECISION FIT FOR VERSATILITY - 20mm diameter and 2.5mm depth ensure seamless compatibility with a wide range of gadgets.
DECADE LONG FRESHNESS GUARANTEE - Store confidently with up to 10 years of guaranteed shelf life—always ready when you need it.
UNMATCHED POWER IN A COMPACT SIZE - 3V lithium tech delivers consistent, high-performance energy for your essential devices.

The VARTA CR2025 lithium button cell battery offers a reliable 3V power source with a compact 20mm diameter and 2.5mm thickness. Packaged in a convenient 5-pack blister, it guarantees up to 10 years of shelf life, making it ideal for a variety of small electronics including remotes, car keys, medical devices, and sensors. Trusted for its premium quality and consistent performance, this battery is a top choice for professionals who demand dependable power on the go.

Specifications

ASIN	B006XE8DEC
Amperage	3 Amps
Antenna Location	Medical Devices,Car Keys,Clocks,Remote Controls,Toys
Battery Capacity	170
Battery Cell Type	Lithium Manganese Dioxide
Battery Weight	0.24 Grams
Battery capacity	170
Battery cell composition	Lithium Manganese Dioxide
Best Sellers Rank	8,281 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 736 in Disposable Household Batteries
Box Contents	5 x 2025 button cell
Brand	VARTA
Brand Name	VARTA
Compatible Phone Models	CR2016, V23GA, V27A
Customer Reviews	4.6 out of 5 stars 21,394 Reviews
Global Trade Identification Number	04008496850891
Item Dimensions	12.8 x 4.5 x 8.5 centimetres
Item Type Name	Battery
Item Weight	0.07 Ounces
Manufacturer	Varta
Model Name	Electronique Lithium
Model Number	CR2025
Number of Batteries	5 Lithium Metal batteries required. (included)
Number of batteries	5 Lithium Metal batteries required. (included)
Recommended uses for product	Medical Devices,Car Keys,Clocks,Remote Controls,Toys
Reusability	Einmalgebrauch
Unit Count	5 count
Unit count	5 count
Voltage	3 Volts

Reviews

D**N

Super

Arrived on time and well packaged. Great batteries.

9.01.2025

A**R

Billy

Good

24.02.2026

C**L

Missing battery from pack

Came quickly but had 1 battery missing from the pack

18.09.2025

J**T

Work

Work fine

17.02.2026

S**Y

Batteries

First class

16.12.2025

S**S

Good price but...

Only 4 cells received. The loose one measured less than 3V. The other 3 were all over 3V. Date on packaging 03-2032.

2.05.2026

R**K

Reliable German Batteries

Love these. More expensive than cheap Chinese products, but the fact that they are made in Germany means they are my battery brand of choice. For applications where I am looking for long life and reduced risk of leakage I always try to buy Varta or Duracell or Energized.

5.01.2022

T**H

Good Batteries

Fast service, good price, dose the job better then a lot of cheaper ones, trusted brand name to me.

25.07.2021

S**O

Buena relación calidad, precio y durabilidad.

Buena relación calidad, precio, durabilidad. Marca reconocida en el mundo de las baterías.

21.05.2025

K**K

Super

21.06.2024

S**E

Piles

Tout est ok.

12.05.2026

A**E

Super Batterien, halten extrem lange, perfekt

Halten super lang, kann ich nur empfehlen. Hab welche verschenkt, gleiches Ergebnis, hält super lange 👍👍❤️

6.05.2026

I**4

Bon rapport quantité/prix

Correspond à mes attentes, bon rapport quantité/prix

18.05.2026

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.