Milwaukee M18 Advanced Battery Life Chart
The following table shows the estimated average lifetime (average number of charge/discharge cycles) of Milwaukee M18 batteries. Please note that these are estimates only and not guaranteed numbers.
Battery Type Capacity (Whr.%) Average Lifetime (Charge/Discharge) Lithium Ion 18650 3200 70% Nickel Cadmium 17500 2700 65% Lead Acid 1500 25% NiMH 14500 2350 60%
Lithium ion batteries have been around since the early 1980’s. They were originally designed for portable devices such as cell phones and MP3 players. Today they are used in laptops, tablets, cameras, watches and many other electronic products. Lithium ion batteries have higher energy density than lead acid or nickel cadmium batteries.
However lithium ion batteries do not last as long as alkaline or rechargeable batteries.
Lead acid batteries were developed in the 1930’s and have been widely used ever since. They are most commonly found in automotive applications like cars and trucks and some consumer electronics such as calculators and TVs. Due to their harmful nature and the fact that they are very toxic, recycling lead acid batteries is very important.
Nickel cadmium (NiCd) batteries have been in use since the 1970’s. They are one of the most efficient rechargeable battery types around and can also be found in many consumer electronic devices such as cordless phones, laptop computers and electric bicycles. Well known manufacturers of nickel cadmium batteries include Duracell and Energizer. NiCad batteries have a “memory effect”.
This means the battery must be completely discharged before recharging.
Nickel metal hydride (NiMH) batteries are similar to lithium ion batteries in that they are also 1.2 volts. However, they are more durable and less prone to “memory effect”. They are used in many portable devices such as digital cameras, camcorders and remotes.
In the next few sections we’ll go through some of the most popular batteries and how they stack up against each other. We’ll examine the pros and cons of each battery type as well as some real life examples of devices that use them.
One of the biggest advantages of using a larger battery is longer life. This is pretty common sense but it’s also important to remember that bigger batteries also take longer to charge and weigh more as well. For instance, a small AA battery weighs about half a gram and can produce about 0.7 volts.
A large D cell battery can weigh up to 2.5 ounces and produce the same voltage. That’s 3,000 times the weight and 10 times longer to charge!
If you want to use a small and lightweight battery but want extended life you can try a specialty battery such as a lithium coin cell. These are very small batteries that can produce up to 1.5 volts. The drawback is that they aren’t always readily available and aren’t cheap either.
Another solution is to use a stack of smaller batteries. For instance, most digital cameras use a set of smaller 1.5 volt batteries in order to get the correct voltage. Most remote control cars and airplanes use a set of smaller than AA batteries in order to get the voltage they need.
Again, the drawback is that this type of set up can be expensive and awkward.
The advantage that disposable batteries have over rechargeable batteries is that you never have to worry about charging them. This can be a big advantage if the battery goes dead at an awkward time or doesn’t get the chance to fully charge in the first place. It’s also nice not having to worry about the battery leaking everywhere or throwing it away properly.
The advantage that rechargeable batteries have over disposables is that they are much cheaper in the long run. If you use a digital camera that requires two AA batteries every two weeks and you have to buy new batteries each time it would cost about $40 a year. If you bought rechargeable batteries and charged them with the same charger it would only cost about $8 per year.
Disposable batteries are everywhere and can easily be found at most grocery stores, convenience stores and big box stores. Rechargeable batteries are a little harder to come by.
Sources & references used in this article:
- Battery pack and internal component arrangement within the battery pack for cordless power tool system (SJ Phillips, DJ White, AM Casalena… – US Patent …, 2012 – Google Patents)
- Power tool, battery, charger and method of operating the same (DJ Alberti, S Bublitz, T Hunkins, KR Jordan… – US Patent …, 2010 – Google Patents)
- Cordless power system (SJ Phillips, JJ Francis, AE Seman Jr, DC Brotto… – US Patent …, 2010 – Google Patents)
- Methods of discharge control for a battery pack of a cordless power tool system, a cordless power tool system and battery pack adapted to provide over-discharge … (D Carrier, B Gorti, D Trinh, R Bailey… – US Patent App. 10 …, 2005 – Google Patents)
- Dual-mode corded/cordless system for power-operated devices (PM Bhagwat, DE Elson, RT Walter – US Patent 4,835,410, 1989 – Google Patents)
- Discharge protection apparatus for a battery-powered device and a method of preventing overdischarge of a battery (KL Glasgow – US Patent 6,211,652, 2001 – Google Patents)