Many tools, children’s toys, smoke detectors, carbon monoxide alarms, and other household gadgets rely on 9-volt (9V) batteries for power, which is why it’s so important to have a pack of reliable and long-lasting 9V batteries at the ready. Though you may think all batteries are basically the same and are just branded differently, there are a number of factors that set batteries from different manufacturers apart. Here’s what to know when shopping for the best 9V battery.
The first decision to be made when shopping for a 9V battery is whether lithium or alkaline batteries are more suited to your needs. Lithium batteries last longer and self-discharge slower than alkaline batteries. For this reason, they’re a good choice for items that aren’t used as frequently, since the battery won’t fully discharge between uses. However, lithium batteries are often more expensive than alkaline batteries. For household items that are used regularly, quality alkaline batteries will usually suffice. Their performance is comparable to that of lithium batteries, and they are less costly.
Another important decision to make before you go battery shopping is whether you want to invest in rechargeable batteries or just buy the disposable kind. Rechargeable batteries are more expensive at the outset, but you will end up saving money in the long run because they can be recharged and used again. Keep in mind, you won’t be able to use the tool or toy that the 9V battery powers while the battery recharges, which could take a few hours.
The last question battery shoppers must answer pertains to how many batteries they need. Do a quick survey around your home as to how many gadgets require 9V batteries, and purchase accordingly. Purchase more batteries than you need to power your 9V devices so you always have a few spare on hand. Also, remember that batteries expire, so consult the battery manufacturer’s literature about the brand’s shelf life to ensure you don’t purchase too many batteries. Most 9V batteries can last for at least 5 years when stored properly.
Our Top Picks
Below are the top picks for the best 9V batteries on the market. These selections include both lithium and alkaline batteries as well as both larger and smaller quantities of batteries. Whatever the number of batteries you need to power your household gear—and whichever type of battery you favor—there are terrific options here for your needs.
For those who need batteries to power their everyday gear, Energizer’s 9V alkaline batteries are a terrific choice. They can be used in clocks, tools, children’s toys, remote controls, smoke detectors, and more. In storage, these batteries can hold power for up to 5 years. They’re also designed to prevent leaks of corrosive materials in drawers or devices. This Energizer pack includes eight batteries.
ACDelco’s 9V batteries are sold by the dozen, which is convenient for shoppers who have a variety of tools, appliances, and gadgets around the home to power. If you don’t have use for 12 batteries right away, no worries—these batteries have a shelf life of up to 7 years. Another reason to consider ACDelco’s 9V batteries is that they are made without mercury or cadmium.
Tenergy’s 9V lithium batteries have a low rate of discharge, depleting in power by only 2 percent each year when stored properly. That enables these lithium batteries to last for 10 or more years in storage. Tenergy’s 9V batteries are UL- and CE-certified and can provide up to two and a half times the power that a standard 9V alkaline battery offers. Another advantage to purchasing these batteries is that they are slimmer and have rounded corners so they fit more easily in electronics’ battery bays. Because they can function in temperatures ranging from -40 to 140 degrees Fahrenheit, these lithium batteries are suitable for use in outdoor equipment.
EBL’s four-pack of 9V rechargeable lithium-ion batteries are recommended for medical devices and smoke detectors, but they can also be used to power countless other household gadgets. A battery charger is included with the set and can charge one or two batteries at a time. These 9V batteries have a low rate of self-discharge and will hold up to 75 percent of their initial power after 3 years in storage.
Those looking for a large quantity of 9V batteries should consider this 24-pack. With a 5-year shelf life, there’s no rush to use the entire pack right away. These 9V batteries come in clear clamshells to help preserve and protect each battery. Energizer’s Power Seal Technology prevents leaks from occurring for up to 2 years after a battery has been fully discharged.
Duracell’s 9V batteries provide long-lasting power to a variety of tools, toys, and gadgets around the home. When used as directed, Duracell’s batteries do not leak or cause damage to the devices in which they are used. They can also last for 5 years in storage. Another pro: these Duracell batteries do not contain mercury.
For those who just need a 9V or two rather than a box of 12 batteries, this two-pack from Rayovac is a worthy choice. Rayovac’s most powerful 9V batteries are designed for devices that consume a lot of power, such as toys, wireless microphones, and smoke detectors. Unlike other batteries that may leak and cause a mess, these feature a leak-proof design. When properly stored, they will hold their power for up to 5 years.