The Amprobe BAT‑250 is a handheld tester designed to quickly assess the charge status of many common household and rechargeable batteries. It shows whether a battery is “good”, “low”, or should be replaced/recharged. It’s made for ease of use, with an ergonomic design and useful features for fast battery checking. Key Features Battery Types Supported: Tests a variety of batteries including: 9V, AA, AAA, C, D, and 1.5V button/coin/watch batteries. Display & Indicators: Uses an analog needle gauge with a color‑coded scale (green = good, yellow = low, red = replace/recharge) to quickly show battery condition. Physical Design: Has a V‑shaped cradle on the side to securely hold different sizes of cylindrical batteries during test A slider mechanism that allows one‑handed operation, making it easy to press the battery against the contact point. The case is contoured for better grip and comfort. Power: Doesn’t require a separate battery to power the tester itself — it operates using the battery being tested. Contacts: The 9V contact terminals are built with good quality materials to ensure reliable contact. Technical Specifications Specification Value Maximum current (I at full‑scale deflection) 9V batteries: ~40 mA; 1.5V types: ~375 mA Nominal load resistance For 1.5V batteries: about 4 Ω; for 9V batteries: about 215 Ω Physical dimensions Approx. 110 × 74 × 29 mm ( ≈ 4.3 × 2.9 × 1.1 inches) Weight About 50 g Usage & Pros/Cons Advantages Straightforward to use: good for quickly checking whether a battery still has usable power. No power source required other than the battery being tested. Works across many common battery sizes — useful for home, workshop, or hobby settings. Clear visual indication (color scale) simplifies results. Limitations / Things to be aware of Because it’s analog and uses a relatively light load for some battery types, it won’t be as precise as a laboratory instrument or more sophisticated battery analyzer under load. The “good / low / replace” thresholds are general; batteries might pass the “good” stage but still have reduced capacity depending on load. For high‑drain devices, even a battery showing as “good” may underperform if its internal resistance is high (which simple testers usually don’t measure).