Copies of documments, mainly manual user instructions (DTR) of devices for testing station batteries, developed at the Institute of Telecommunications and published at https://www.il-pib.pl/pl/ (links). The devices were produced between 2000 and 2018 in many versions. The team of constructors finished work at the IL in 2019, but many of these devices are used in Poland. Equipment repairs are still being carried out at the IŁ. Some documents were translated into English. A few articles about TBA testers can be found in the PUBLICATIONS tab of this website.