Currently viewing the category: "Rechargeable Batteries"

The Best Rechargeable Batteries and Chargers Of 2012

By On January 13, 2012 · 128 Comments

In A Nutshell

Overall, the best rechargeable AA battery is the Eneloop Pro (aka Sanyo XX Battery Powered By Eneloop). These batteries hold their charge for 12 months. They also have a high energy capacity (2500 mAh), and they perform better than similar high-capacity AAs (see my article for [...]

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Charging USB Devices With AA Batteries

Charging USB Devices With AA Batteries

By On August 27, 2011 · 1 Comment

In this article, we will share with you some devices that use AA batteries to charge USB-powered small electronics. These devices provide a convenient way to stretch the time between wall outlet recharges.

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The Best Rechargeable D Size Batteries & Chargers

By On March 1, 2011 · 2 Comments


The best rechargeable D size batteries are the new LSD Ni-MH (low self-discharge Nickel-Metal Hybride) cells. These new Ni-MH rechargeable batteries are able to retain a charge for a year, making them suitable for using in flashlights and other low-term applications.

See also our full review of the

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Personal Energy Generator Recharges Your Electronic Device While You Move

By On January 17, 2011 · 1 Comment

The new nPower PEG (personal energy generator) by Tremont Electric wowed reviewers at the 2011 CES convention. This back-up hybrid charger allows you to keep your cell phone, iPod, or other hand-held device working while you’re on the go. By harnessing the kinetic energy that you produce through movement, then converting [...]

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MetaEfficient Keyring Tools For 2010

By On February 15, 2010 · 3 Comments

Here’s a MetaEfficient Keyring. It’s a collection of lightweight, mini-tools suitable for carrying on a keyring.

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Toshiba Dynario Fuel Cell Device Charger

By On November 10, 2009 · 4 Comments

The first commercially available fuel cell device charger is here! (Well, technically it’s only “here” if you’re reading this in Japan, but that should soon change). Toshiba’s Dynario charger packs fuel cell technology into a portable package that can provide instant power to a dead mobile phone or other gadget, completely off the grid.

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The Best iPhone Battery Pack

By On September 28, 2009 · 2 Comments

The iPhone can be power-thirsty. For many people a battery extender is an essential iPhone or iTouch accessory. Here are four of the best backup iPhone battery packs.

Note: iPhone battery performance times vary widely based on individual usage habits and applications. Wherever possible we have tried to give details of a backup battery’s capacity [...]

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powerex-batteries

The Highest Capacity Rechargeable AA Batteries

By On December 18, 2008 · 8 Comments

For powering high-drain electronics such as digital cameras, the most efficient batteries to use are high-capacity Nickel Metal Hydride (NiMH) cells. Higher capacity batteries store more charge and they can power your devices longer.

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New Lithium-Ion Battery Recharges To 90% Capacity In 5 Minutes

By On November 24, 2008 · 13 Comments

Toshiba has developed a new lithium-ion battery called SCiB (or Super Charge Ion Battery) which can charge to 90% capacity in 5 minutes. The life cycle of the new battery is more than 10 years even if it is rapidly charged and discharged many times. The battery is also mucher safer than other [...]

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The PowerGorilla: Flexible Portable Power

By On October 14, 2008 · 3 Comments

I’ve been testing a device that just been introduced called the PowerGorilla. It’s a portable power pack that acts an emergency back-up charger for your laptop computer other other electronic gadgets. The battery inside the PowerGorilla is a lithium-ion and weighs just 631 grams (1.4 pounds). [...]

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