BTL20ANG is an angled intelligent test probe designed for the Fluke 500 Series Battery Analyzer, featuring an integrated LCD display and rugged coaxial two-pole Kelvin test pins with a remote SAVE button. The probe measures internal battery resistance (3 mO to 3000 mO range with 0.001 mO to 1 mO resolution), DC and AC voltage (6 V to 1000 V range), AC current (up to 400 A with accessory i410 clamp), ripple voltage (600 mV to 6000 mV), frequency (up to 500 Hz), and supports automatic or manual sequence testing of battery strings with automatic measurement storage. The angled probe design provides long reach capability for double-stacked cells, while the integrated save button and verbal audio feedback reduce test time and increase measurement efficiency. This probe is ideal for maintenance, troubleshooting, and performance testing of stationary batteries, with applications in UPS systems, renewable energy installations, and industrial power backup equipment.