411A Battery Adapter for AVO 8 Meter (15V, AG10, NEDA 208, BLR121)

• Replacement for the rare 411A: same design as the hard-to-find 411A / BLR121 carbon-zinc battery.
• Lasts longer than the original: modern AG10 alkaline cells provide significantly longer runtime than the historical carbon-zinc chemistry.
• Ready to use immediately: 10 fresh AG10 batteries included.

Compatibility

Replacement for the following battery types:

10F20, 208, 411, 411A, A411, B121, BA 331/U, BLR-121, BLR121, K10, M121, U10, VS082

Suitable for:

• AVO 8 Meter (e.g. Mk III)
• Vintage transistor radios

Included

• 1x battery adapter (411A design)
• 10x AG10 battery

Technical details

• Voltage: 15 V
• Capacity: approx. 180 mAh
• Dimensions: 26.2 mm x 16.1 mm x 37 mm
• Connections: socket contacts
• Material: engineering plastic
• Color: Black

Description

The original 411A (also Eveready 411 or BLR121) was a carbon-zinc battery and is now difficult to find or often past its shelf life. This adapter brings your classic meter back to life: it holds 10 standard AG10 alkaline cells and provides a stable 15 volts with higher capacity.

This design is mainly used in early AVO 8 meters (e.g. Mk III) and old transistor radios. Instead of paying twice as much for an outdated original, use the adapter with readily available AG10 cells.

Frequently asked questions

Is the adapter designed for my AVO meter? It has the 411A design with socket contacts and replaces NEDA 208 and BLR121 batteries. It is designed for the AVO 8 Meter and devices with the same battery compartment.

Where do the 15 volts come from? From ten AG10 cells connected in series. All ten are included, and the capacity is approximately 180 mAh, which provides long runtime for the low power consumption of a meter.

Will it fit in the battery compartment? The adapter measures 26.2 x 16.1 x 37 mm and therefore matches the original cell. If in doubt, measure your compartment before ordering.