Many vintage radios and other collectible electronic items use small round 9-volt batteries similar to the one in the photo. Fresh batteries like these are difficult or impossible to find and often cost more than this adapter. 

The adapter lets you use inexpensive contemporary batteries instead of vintage round ones. You can also use this for long rectangular batteries such as the Eveready RE2364. It provides 9-volts at the proper polarity for your radio or other devices. You might need to make minor modifications to the insides of some radios to make today's batteries fit. Sample instructions are included.

The old round batteries have contacts which are larger than the ones used today. This adapter converts the large contacts to today's smaller ones and provides 9-volts at the proper polarity for your radio or other devices. 

Battery examples include: 

Radios that used this battery style include:

Airline GEN1106A, GTM-1108A, GEN-1112A; Arvin 8576, 9577D; Astra STR-620; Aurora TPR-806; Capri TR600, TR700; Crown M600TR, TR-400, TR810; Excel MHT-6, 6T-2; General Electric PB815, PB816, PB30, PB831; Holiday BJB-6; Kikusui TR-602; Lifco Radio; Marveltone Radio; Motorola X14, X15; Onkyo TR-110; RCA 7BT9, 8BT7, 8BT8, 8BT9, 9BT9; Silverton Sears 211, 212, 213, 8204, 8206, 8208, 9202, 9203, 9204, 9205; Victor TA-2750; Westinghouse H587P7, H588P7, H589P7, H610P5, H611P5,H612P5, H617P7, H618P7,H619P7H651P6, H652P6,H653P6, H693P8, H694P8, H695P8; Yuko AK-100, AK-400

Here is what people are saying about these adapters:

The large snap connectors used in this adapter are getting increasingly difficult to find. You might want to purchase more than one of these adapters while you can. 

You will receive an adapter only. The batteries shown in this listing are to illustrate the adapter's use, and are not included in your purchase.

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