The black plastic body of the device is designed to hold four AA batteries with a switch to turn it on/off. Note: does not include 4 AA batteries ）. Get your hands on this power bank and never run out of battery again.
eBay
ANENG BT189 Battery Tester for C,AA,AAA,D,N,9V 6F22 Batteries 1.5V 3V Button Cell Battery Indicator Electric Tools
Aliexpress UK
Descriptions:This battery box holder fit for 4 x 1.5V AA battery.With weld leg design, you can easily put the battery in it.Simple operation, compact size, replacements for replacing your old or damaged ones.Battery is not included here.1. When the battery case is working, the maximum power should be less than 10W, the working current should be less than 2A.2.Please pay attention to your battery heat generation while using this product and do not use the poor quality battery.
eBay
Bt-168Pro Battery Tester Checker, Digital Display Battery Tester Checker for 9V 1.5V, AA AAA C D Button Cell Batteries Checker
Aliexpress UK
For use with D / C / AA / AAA size. ♥ Hengkun Electronics Co., Ltd Founded In Now 2013. Anything else you need?. -22 different Kinds of battery Holder. Colour: Black. Moulded from black thermoplastic (ABS).
eBay
1/2pcs BT-168 Battery Tester, Universal Battery Tester, Battery Tester for Household Battery, Suitable for AAA AA C D 9V 1.5
Aliexpress UK
With ON/OFF power switch and sliding closure that can be locked by screw, easy to carry. Quantity of Storage: 1-8pcs AA Batteries. 1 x Battery Holder Case. Made of high-quality ABS, resistant to impact, solid and durable.
eBay
YICHENG (2 Pcs) Battery Tester, Universal Battery Checker for AA / AAA / C / D / 9V / 1.5V Button Cell Batteries,BT-168/BT-168D
Aliexpress UK
Equivalent to AA (U12 / HP7 / LR6 / 15A). 1x 2xAA Battery Holder Supplied. 1 Battery a Side. Moulded from black thermoplastic (ABS). Mon - Fri 9 - 3pm.
eBay
JJC Battery Tester Checker Battery Capacity Tester Analyzer Universal Battery Checker For AA AAA C D 18650 CR2032 CR2025 Battery
Aliexpress UK
AA x 2 Battery Holder. Connection Wire & On/Off Switch. For use with AA size. Battery Holder with. Suitable IEC battery types: FR6, HR6, LR6.
eBay
LCD Digital Battery Tester Battery Level Detector Volt Measure Battery Checker Measurements Tester for C D N AAA AA Button Cell
Aliexpress UK
ABS material, High strength and toughness, high temperature resistance, with wire, convenient for soldering. Construction: two layers, each layer can load 2 AA batteries, totally can load 4 AA batteries.
eBay
Digital Battery Tester LCD Display AAA AA Button Cell Battery Checker Volt Measure BT189 Battery Capacity Indicator Meter Tools
Aliexpress UK
Description: Name: battery holder Material: PP soft rubber material Hardware: Nickel Plated Brass Spring: Steel nickel plated Rivets: Nickel-plated steel
eBay
BT‑168D Battery Volt Tester Digital LCD AA//C/D/9V/1.5V Button Cell Battery Volt Tester BT‑168D Battery Tester
Aliexpress UK