Full credit to Towerdog for having found so many products matching this family's battery pinout / configuration. Prior to finding this post, I began searching and cross referencing batteries / adapters for a model Albrecht AE2990 AFS. After compiling a pretty nice list (separated into 7.4V and 12V varieties), I found this post matching some the models I'd found. I wanted to provide my models to add to Towerdog's list. Hopefully, our combined info can help others to find their own model on the list, and then find a related model's battery/adapters available in their own area or online, over time.
I've not researched the internal voltage specs for all models listed.
My list below was compiled based on info found, where battery/accessory sellers claimed the model to be compatible, or associated it with known 7.4V, or 12V batteries. Some models can be found under both voltage categories.
As for the Albrecht AE2990AFS, that model can officially accept 10.8~13.5V (specs show 9 x 1.2V NiMH, or 9 x 1.5V Alkaline cells). But per the schematic, this model appears to use a BA05(T?) regulator, and should be safe in accepting either 7.4V or 12V batteries / accessories (the regulator's min/max voltage is 6V ~ 25V, just for reference). This model also supports the Midland 18-821 Mobile Adapter accessory, which connects to a car's 12V power, and also has an SO-239 for connection to an external antenna.
7.4V
ADI AT2, AT200, AT201, AT400, AT401, AT600
Standard C150, C158, C158A, C28A, C228, C228A, C450, C528A, C558, C558A, C628, C628A
Horizon HT200, HT400, HT401, HT600, HX190, HX240, HX260, HX268, HX460, HX520, HX620
JRC JHP-500, JHP-520
12V
ADI AT200, AT201, AT400, AT401
Standard C112, C150, C158, C28A, C228, C412, C450, C520, C528, C558, C620, C628
Horizon HX240, HX241U, HX260, HX268
Alan 42 Plus
Albrecht AE201, AE2990AFS
Cherokee AH-100, AH-27, AH-50
Cobra HH-45, HH-46
Dragon AH 100, SS201, Sy101, Sy501
Eagle Spitfire 454
Intek SS 201
Magnum 1010, Magnum 1012
Maycom AH27
Midland 75-820, 75-822
Titan RPSY