This tester could test relay condition,whether relay on or off. (Market products do not have this function. 1x Relay tester. Wide range of relay compatibility: support for 5 different foot type of relay, more than 20 kinds. ).
eBay
Universal Rechargeable 12V 4000mAh Lithium Battery for Electric Screwdrivers, Drills, Mini Angle Grinders, and Other Power Tools
Aliexpress UK
Universal Battery Tester :This Universal Digital LCD Battery Checker is designed to test a wide range of batteries, including AA, AAA, C, D This Universal Digital LCD Battery Checker is designed to test a wide range of batteries including AA, AAA, C, D,, and 9V button cells, making it a versatile tool for your electrical needs.
eBay
Portable Button Battery Charger Universal Mini Coin Cells Charger With LED Indicator Light For LIR2016 LIR2025 LIR2032 LIR1025
Aliexpress UK
9V: PP3, MN1604, 6F22, 006P. Universal Button Battery Checker Tester AA AAA C D 9V. Checks power level of all 1.5V & 9V batteries. Place your battery between the two points of the battery tester. The battery tester may be used to test the following sizes.
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Portable Button Battery Charger Universal For LIR1025 LIR1220 LIR1254 LIR1620 LIR1632 LIR2016 LIR2025 LIR2032 LIR2430 LIR2450
Aliexpress UK
eBay
Button Battery Charger With LED Indicator Portable Charger Universal For LIR2016 LIR2025 LIR2032 Accessories
Aliexpress UK
🔋 BT-168D Universal Digital Battery Tester – LCD Display. Simply place the battery into the tester slot, and the LCD screen will display the remaining power level instantly. ✔Universal Compatibility – Tests.
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DC 7-55V Acid/Lithium Universal Battery Charge Indicator Board LED D isplay Indicator Voltage Charge Indicator 20MA with Alarm
Aliexpress UK
Handheld Universal Analogue Battery Tester Tool 1.5V AA AAA C D. 9V Button Cell U. 9V Batteries. Quickly check the power level of your batteries with thiscompact and easy-to-use battery tester. 9V Battery: 215Ω.
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Button Battery Charger With LED Indicator Portable Charger Universal For LIR2016 LIR2025 LIR2032 Accessories
Aliexpress UK
This digital battery capacity gauge tester is a must-have for anyone who uses batteries on a regular basis. With the ability to test the capacity of AAA, AA, C, D, and 9V batteries, it's a versatile tool that can save you time and money. The tester is compatible with multiple battery types and is designed to be easy to use. Whether you use batteries for your electronic devices, toys, or other items, this tester can help you ensure that they are performing at their best. The compact design makes it easy to take with you wherever you go, and the clear display makes it easy to read the results. Don't waste time or money on batteries that aren't performing as well as they should. Use this battery capacity gauge tester to get the most out of your batteries.
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Universal Battery Adapter MT20DL MT20BSL MT20ML MT20MN MT20RNL MAK1820 For Makita For Milwaukee For Bosch For Dewalt For Ryobi
Aliexpress UK
Suitable for testing AA, AAA, C, D and 9V PP3 batteries and button cells. Suitable to test AA, AAA, C, D and 9V PP3 batteries and button cells. Handy, compact battery tester. Handy battery tester with an easy-to-read analogue display.
eBay
Button Battery Charger With LED Indicator Portable Charger Universal For LIR2016 LIR2025 LIR2032 Accessories
Aliexpress UK