One important consideration when choosing a portable handheld two way radio is power. Since batteries are usually the primary sources of power for handheld radios, the type of power cells needed is a key question. There are many makes and models of radios to choose from and there are a many different types and sizes of batteries available on the market, some of which are only compatible with specific radios, so the answer can be quite confusing.
In the case of Cobra FRS/GMRS two way radios, the battery options are specific, yet they vary significantly between different models within the product line, even between models that use the same type of battery. To simplify things, we've created a chart that compares all current Cobra consumer walkie talkies with the types, sizes and the number of batteries each radio requires.
| Model | Battery Type | Size | Quantity |
|---|---|---|---|
| CX112 | Alkaline | AAA | 3 |
| CX210 | Alkaline | AAA | 4 |
| CX312 | Alkaline/Rechargeable | AA | 3 |
| CXT135 | Alkaline/Rechargeable | AAA | 3 |
| CXT145 | Alkaline/Rechargeable | AAA | 3 |
| CXT235 | Alkaline/Rechargeable | AAA | 4 |
| CXT345 | Alkaline/Rechargeable | AA | 3 |
| CXT390 | Alkaline/Rechargeable | AA | 3 |
| CXT425 | Alkaline/Rechargeable | AAA | 4 |
| CXT545 | Alkaline/Rechargeable | AA | 3 |
| CXR725 | Lithium-Ion | CXR725 Battery Pack | 1 |
| CXR825 | Lithium-Ion | CXR825 Battery Pack | 1 |
| CXR925 | Lithium-Ion | CXR925 Battery Pack | 1 |
Hi! I’m still trying to get my walkie talkie 2-way portable cobra HH 40 battery pack to work. I’ve got it pulled in and it charged most of the day with 1000 mah batteries buckle cadmium . The red light is showing on the charging. Is the light supposed to be a solid red or go green when changed. It works with power cord but not batteries. Just keep charging??
We don't carry the HH40 so we have no information on it. However, it is a very old model that was long discontinued. It was replaced with the Cobra HH50 some years ago, which we do carry. From what you described, and due to the age of the radio, the issue could be due to a number of things, including the batteries. If they are after market batteries and not the ones originally supplied or recommended by Cobra, I would not charge them directly in the radio.
What I would suggest is to try asking in The Two Way Radio Forum. It's free, and you may find someone there who is familiar with the radio and can provide more insight or assistance with troubleshooting the issue.
Hi! I have a Cobra HH 40 and the battery pack won’t work. The radio works with power but not with the battery compartment. I bought Tenergy nickel cadmium batteries 1100mah each and put in ten batteries. What could cause the batteries not to work?
Hi! I’m trying to purchase batteries for my cobra 2- HH-40 2- way portable handheld 40 channel radio. They have opening for four or 5 Aa slots. They have to be Nickle cadmium.