Monarch Instrument TI-5V/DIS/STDB Analog 5 V Track It Logger with display, 5 V module and standard battery from Cole-Parmer Germany
WIFI D1 mini - Data logger shield: RTC DS1307 with battery + MicroSD
load cell data logger
Temperature Data Logger Battery Replacement for Testo 0515 0177 - 2700mAh, 3.6V, Li-SOCl2 - Electropapa
RC Logger Scale model battery pack (LiPo) 11.1 V 5200 mAh No. of cells: 3 Softcase XT60 | Conrad.com
GPS datalogger MSR175plus for transport monitoring
Data Logger with USB Replacement Battery
ESP8266 D1 Mini Pro WiFi NodeMcu Data Logger Shield DS1307 Battery 0.66 OLED DC Power Buzzer V1.0.0 Dual Base for WeMos DIY Kit|Integrated Circuits| - AliExpress
Simple Battery Logger - Apps on Google Play
Amazon.com: Battery for Part NO. Graphtec B-517, Graphtec GL220 Data Logger : Health & Household
Simple Battery Logger - Apps on Google Play
SenseCAP Sensor Hub 4G Data Logger with built-in Battery
Blog - Battery Monitoring | shop.GWL.eu
Replacement batteries (Pack of 5) HRB-TEMP-1 | Onset Data Loggers