Well, darling, the only difference between a 9v1 and a 9v2 battery is the capacity. The 9v2 battery simply has a higher capacity than the 9v1 battery, meaning it can last longer before kicking the bucket. So, if you want your device to keep on truckin' without needing a battery change as often, go for the 9v2.
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The main difference between 9V1 and 9V2 batteries is their capacity and discharge rate. The 9V2 battery typically has a higher capacity and may provide longer-lasting power compared to the 9V1 battery. Additionally, the 9V2 battery may have a higher discharge rate, allowing it to deliver more power in a shorter amount of time.