Model: GVD 1000-17. Low battery warning: Audio alert + dual LED flashing before automatic shutdown.
eBay
OFW 2025 FWV-100 20KM Optical Fault Finder VFL optical time-domain reflectometer FTTB FTTH breakpoint tester Meter, Fiber Ranger
Aliexpress UK
Adapter battery: The digital battery monitor is suitable for DC8-30V lead-acid batteries, ternary lithium batteries, and iron lithium batteries. Compatible battey type: Ternary Lithium / Lead-acid / LiFePO4.
eBay
1/10/20/30/50MW Mini Visual Fault Locator Optical Fiber Cable Tester 2.5mm(SC/FC/ST) Interface FTTH Fiber Optic Tool VFL
Aliexpress UK
Through-hole design: No wiring difficulty. No current direction limitation. This Battery Monitor is designed to monitor performance most kind of battery systems with capacities of up to 999 Amp hours.
eBay
SAIVXIAN A-50/A-50+ Active Optical Fiber Identifier Fiber Cable Tester Detector with 30mw Visual Fault Locator
Aliexpress UK
0-120V lead-acid batteries, lithium batteries, iron-lithium batteries and all other batteries can be used. ►The shunt and the screws are made of pure copper material, and the power consumption in standby mode is very low；.
eBay
ROVLL Network Telephone Cable Tester Networking Tool For 8P8C RJ45 RJ11 RJ12 UTP STP LAN Wire Test Tool
Aliexpress UK
Battery Tester ×1. NOTE: This item is without the battery ,pls note it ! Function: Battery Capacity Testing. Display Type: Digital. Otherwise deal is final. Product Model: BT-168. Weight: 0.05 (Kg).
eBay
NanoVNA-H Vector Network Antenna Analyzer 10KHz-1.5GHz MF HF VHF UHF W/ Shell SD Card Slot Supprt 32G Digital Nano VNA-H Tester
Aliexpress UK
JST-PH 2.0 Connector (AKA PowerWhoop connector - mCPX). Ultra Micro JST 1.25 Connector (MCX). Connector: Micro JST 1.25, JST-PH 2.0 Micro Losi and JST. JST Connector. The checker supports both Li-PO and Li-Hv battery types as well as four different connectors, so no matter if you are using a battery with JST-PH connector or Molex connector, this little guy can check them all.
eBay
Proskit 4-in-1 Multifunctional MT-7616/7615 Optical Power Meter Fiber Network/LAN Cable Tester Visual Fault Locator Portable
Aliexpress UK
RT01 can quickly detect whether your relay is normal.It is easy to use and suitable for general-purpose automotive relays on the market.Durng testing, it needs to be connected to a 11V-25V battery in the car.
eBay
VFL visual fault locator 650nm 1mw 10mw 20mw 30mw TM-18 Optical Fiber light source Pen fiber tester optical detector
Aliexpress UK
Detect Car Battery.
eBay
NOYAFA NF-8509 two-in-one Multimeter Tester Network Line Cable Finder for POE Test NCV AC DC LCD Wire Tracke
Aliexpress UK