Exell A221/505A 22.5V Alkaline Battery For AVO Meters, Flash Units & Vintage Gear

Exell A221/505A 22.5V Battery for Precision Electronics & Flash Units

The Exell A221/505A is a 22.5 V alkaline cylindrical battery engineered to replace older zinc-chloride models in precision devices. Measuring 50.2 mm in height and 15.9 mm in diameter with a 60 mAh capacity, it delivers stable power and a significantly longer lifespan—up to four years in storage. This battery is ideal for vintage AVO meters, flash units, collectible transistor radios, and condenser microphones that require exact voltage and size specifications.

Compact yet powerful, the A221/505A excels in legacy flash gear—like the Bolsen Flash Unit, Ricoh 500, and Kodak Brownie 4—as well as in precision test instruments and older audio equipment. Built to meet NSN 6135‑00‑880‑1026 standards, it offers a reliable modern solution for enthusiasts, technicians, and restoration professionals.

Fits the Following Devices

• Ammeter & Test Meters: Classic AVO multimeters
• Flash Units: Bolsen flash, Ricoh 500, Kodak Brownie Flashholder 4
• Audio & Radio Gear: Vintage transistor radios, Telectron & Syncron condenser mics
• Other Precision Electronics: Garage door sensors, remote switches, project gear needing 22.5 V

Replaces These Legacy Part Numbers

• Common Designations: 221, 505, 505A, 505E/B, 75
• Industry Standards: NEDA 221, IEC 15F15, ANSI equivalents
• Legacy Codes: 15F15, 15LR54, 333/U, A221, A505, B155, BA333U, BL-MV15, BLR155, DRY1715, E505, EV505, M505, MV15E, NR75, VS705, W15, Y‑15
• Equipment Equivalents: Bolsen, Ricoh, Kodak Brownie, overhead door sensors (R802), Telectron 182532T, Syncron AU7a