Cordless Drills- Best Sellers

by Editor on May 31, 2015

Cordless drills are an essential part of an electrician’s tool kit. It’s always interesting to know which models are the best sellers when upgrading. You can check them out here:

Bestselling Cordless Impact Drivers

No more aching wrist! My Dewalt impact driver is my favorite piece of kit and I now look forward to installing fixings.

Best Selling Cordless SDS Drills

 

Cordless For Electrical Work

Cordless battery drills and impact drivers provide a safer and easier alternative to powering your tools using extension leads. They are especially suitable for electricians who work in situations where either there’s no power or they need the installation to be ‘dead’ for carrying out work.

Batteries
When you’re comparing prices for cordless drills it’s definitely worth checking if they actually come with a battery. Does the price seems too good to be true? If so, it may only include the drill body.

It’s also a good idea to have at least one spare battery. By rotating the charging of 2 batteries for each tool you’ll be sharing the use between them, they’ll last longer, and will always have one fully charged and ready to go.

Ni-Cd or Li-on?

A higher voltage isn’t necessarily the answer if you want more power from your battery drill. The weight, charge & discharge time and power depends on the type of battery and amp hour (ah) rating.

Cordless tools with Nickel Cadmium (NiCd) batteries may be cheaper and better value for occasional DIY use but now they don’t tend to offer the energy storage capacity of the latest Lithium-ion (Li-Ion) batteries.

Li-ion claim give the best energy densities, no memory effect (which means that they can be charged at any time without affecting their charge capacity), and a slower loss of their charge when not in use. They are also lighter and will charge faster although battery life spans can vary. As an example, Makita claim that their Li-ion batteries will achieve a massive 2000 re-charge cycles using their “Optimum” charging system.

Memory Effect?

Memory effect is said to be a problem with nickel cadmium re-chargeables. It’s where they hold less and less charge, depending on use.

An example of battery memory effect is when a Ni-cad battery is charged without being fully discharged. The battery remembers it has a smaller capacity and gradually reduces its charge level. This is not thought to be the case with with lithium-ion batteries.

Another advantage of lithium-ion batteries is their self-discharge rate. All batteries will slowly release their charge when not in use but it’s estimated that Li-ion will self-discharge at approx 5-10% of their charge per month, compared to about 30% with Ni-cads.


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