A 9-volt battery is a power source commonly used in small electronic devices, appliances, and home security devices. They are easy to replace and install, just like you would with an AA or AAA battery.

Nowadays, they are commonly used in the professional and domestic environment. They have a rectangular shape with rounded edges and are built with six LR61 cells of 1.5V. Lithium batteries tend to run longer for high consumption devices, while alkaline batteries offer a more accessible option for low power devices.

Top 10 9 Volt Battery

Bestseller No. 1
Energizer E522 Max 9V Alkaline battery Exp. 12/22 or later - 8 Count
170 Reviews
Energizer E522 Max 9V Alkaline battery Exp. 12/22 or later - 8 Count
  • Power Seal Technology extends across the full MAX® product line, so you can be confident you'll
  • Shelf life for MAX® varies by product. Our AA, AAA, C, and D batteries have a shelf life of 10
Bestseller No. 3
AmazonBasics 9 Volt Everyday Alkaline Batteries (4-Pack)
5318 Reviews
AmazonBasics 9 Volt Everyday Alkaline Batteries (4-Pack)
  • 4-pack of 9-volt alkaline batteries
  • 3-year shelf life so you can store for emergencies or use immediately
Bestseller No. 4
Energizer Max Alkaline 9 Volt, 4-Count
400 Reviews
Energizer Max Alkaline 9 Volt, 4-Count
  • 4-pack of Energizer MAX alkaline 9V batteries
  • Our long-lasting MAX 9 Volt batteries power everyday devices
Bestseller No. 5
Energizer E522 Max 9V Alkaline battery Exp. 12/22 or later - 4 Count
339 Reviews
Energizer E522 Max 9V Alkaline battery Exp. 12/22 or later - 4 Count
  • 4pcs. 9V Battery Bulk Packaging
  • Up to 5-year shelf life
Bestseller No. 6
Energizer 9V Alkaline General Purpose Battery - Alkaline - 9V DC - 2 pack
177 Reviews
Energizer 9V Alkaline General Purpose Battery - Alkaline - 9V DC - 2 pack
  • 1 package of 1 9V alkaline batteries
  • Best for everyday electronics
Bestseller No. 7
ACDelco 9V Super Alkaline Batteries in Reclosable Package, 12Count
214 Reviews
ACDelco 9V Super Alkaline Batteries in Reclosable Package, 12Count
  • 12 9-volt batteries in recloseable storage pack
  • Performs better than the competition in high-drain and super high-drain devices
Bestseller No. 8
Energizer Industrial 9 Volt Batteries, Alkaline 9v Battery (12 Count)
483 Reviews
Energizer Industrial 9 Volt Batteries, Alkaline 9v Battery (12 Count)
  • Offers the longest lasting power source.
  • No mercury added Special disposal not required.
Bestseller No. 9
Energizer Max Alkaline 9 Volt, 24 Pack
35 Reviews
Energizer Max Alkaline 9 Volt, 24 Pack
  • 24pcs. 9V Battery
  • Up to 5-year shelf life
Bestseller No. 10
9V Batteries - 8 Pack, Energizer MAX Premium Alkaline 9 Volt Battery for smoke alarms, smoke...
14 Reviews
9V Batteries - 8 Pack, Energizer MAX Premium Alkaline 9 Volt Battery for smoke alarms, smoke...
  • 8-pack of Energizer MAX alkaline 9V batteries
  • Our long-lasting MAX 9 Volt batteries power everyday devices

Rechargeable low-discharge lithium-ion battery EBL high-volume 9V

This battery was selected as the best rechargeable 9V battery by several independent review sites. They come pre-charged and can be recharged up to 1200 times. The improved “low self-discharge” means that they will maintain the load for one year and can maintain 75% capacity after three years of constant use, which is ideal for fire alarms, home security, medical devices and audio professional. They can be loaded at any time and offer a practical operation without memory effect. The battery uses a new type of electrolyte gel, which has an energy density of 20% more than other lithium-ion batteries with only 550mAh capacity. In addition to holding your charge for longer, they also last up to three times longer than other 9V NiMH rechargeable batteries.

The batteries are backed by excellent reviews, a 30-day refund, and a one-year limited warranty. If you still do not have a universal charger for rechargeable batteries, consider the affordable EBL 829 Universal battery charger for AA / AAA / 9V / 18.650 rechargeable batteries.

Battery Buying Guide

Batteries play a hand in the overall running costs of home devices, but to keep expenses down, you’ll need to pick the right battery for your needs. There are two popular battery types: Single-use batteries and rechargeable batteries.

Single-use batteries (Disposable batteries)

Single-use batteries are made to be used until they have no power left. Depending on types, single-use batteries can retain their initial charge from 7 to 15 years on the shelf. If you need a size other than AA or AAA, there are more options available among single-use batteries than rechargeable units.

Single-use batteries come in two types: alkaline and lithium. Alkaline and lithium batteries are functionally about the same in almost all aspects.

Rechargeable Batteries

Rechargeable batteries are more expensive initially than single-use batteries, costing anywhere from $15 to $40 for a pack of eight AAs. If you’re looking for the battery for high-powered devices such as digital radios, DSLR accessories, it’s best to buy a rechargeable AA and AAA batteries. Of course, you will need to add the cost of a charge, however after a dozen or so uses, rechargeable batteries more than pay themselves off.

It’s also worth noting that not all rechargeable batteries are made equal. That said, they lose charge just by sitting around, unused (is known as self-discharging). If you’re looking for rechargeable batteries for tools that aren’t used often, you will want to consider a low self-discharge battery. These batteries can hold onto a charge for a longer period of time when not being used. Some NiMH rechargeable batteries are low self-discharge, though still nowhere near as long as most single-use batteries.

What to consider before buying the right batteries

Your devices

As you may know that you can use any battery type to power your low drain devices but for high-drain devices, you will need to choose the right type of battery for them. Generally, lithium batteries are a great choice for high drain devices, but rechargeable models can offer better long-term value, especially in devices that see a lot of use. If you decide to go for rechargeable batteries, look for high capacity. The larger the capacity, the longer it will run on a single charge. However, high capacity batteries cost more, so they’re not worth using for low-drain devices.

Shelf life

Every battery will slowly lose its charge over time as a result of leakage between the terminals. While alkaline batteries last 5 to 7 years in storage, lithium batteries last 10 to up to 15 years.

As mentioned earlier, rechargeable batteries lose power much faster than single-use ones, but newer low self-discharge batteries like lithium-ion rechargeable batteries, hold their juice better than others. While traditional rechargeable batteries hold less than 50 percent of its charge after a year of storage, low self-discharge batteries can retain as much as 85 percent.

Battery life

For single-use batteries, battery life is simply how long they can power your tool. For rechargeable batteries, you need to consider how long they can run on a single charge and their service life, or how many charging cycles they can survive.

For rechargeables, low self-discharge or high capacity

Lithium-ion rechargeable batteries offer the self-discharge rate that is lower than most other rechargeable models. However, these batteries are available in 9-volt sizes, for example, the EBL 4 Pack 9V 6F22 600mAh High Volume Lithium-ion Rechargeable 9 Volt Li-ion Batteries

NiCd and NiMH rechargeable batteries have a high self-discharge rate, but there are some other low self-discharge versions available (such as Eneloop). The tradeoff is that these batteries have a little lower energy capacity. So when choosing a rechargeable battery in AA or AAA sizes, generally you have to choose between higher capacity or longer shelf life. If you go months before using up the battery’s capacity, get the low self-discharge models so you can enjoy the longer shelf life. But if you burn through batteries quickly, go for normal NiMH batteries instead.

Another great thing about the low self-discharge batteries is that they come pre-charged. NiMH rechargeable batteries must be charged before first use.

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