When you're evaluating batteries for your online store, the hassle isn't just the price. It includes the time you spend dealing with returns, the cost of shipping back defective units, and the headache of managing customer complaints. A battery that costs a dollar less but has a 5% failure rate will cost you more in the long run than a slightly pricier one with a 1% failure rate.

Another hassle is the regulatory side. If a device causes a safety incident, you might face liability issues, even if the problem was with the battery. Some retailers have had to pull products after reports of fires. That's the kind of nightmare that can tank your business. So it's worth the extra effort to choose a battery that has certifications like UL or CE, which indicate that the device has been tested for basic safety.

Don't forget the hassle of customer education. If the battery is not intuitive to use, customers might mishandle it—like leaving it in a hot car or using the wrong charger—leading to premature failure or even a safety hazard. That's not your fault, but you'll still have to deal with the fallout. So look for devices that are idiot-proof: they should have features like over-discharge protection that cuts off the battery before it gets too low, and reverse polarity protection if the battery is replaceable.