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Lenmar R2G802U R2G 2 Hour Charger Includes USB Output and Alarm Clock with 4 R2G 2150mAh NI-MH for AA/AAA Batteries (Discontinued by Manufacturer)

2.8 out of 5 stars 13 customer reviews

Available from these sellers.
  • Includes Ready-2-Go, Four AA 2150mAh Rechargeable Cells
  • 2-Hour Charger with Built-in USB PowerPort, Charges 1-4 AA/AAA NiMH cells
  • Charger also includes Travel Alarm Clock, Day/Date and Temperature functions
  • International compatible voltage - can charge from 100-240VAC, 12VDC, or standard USB power source
  • 2 Year Warranty
2 new from $43.44 1 refurbished from $15.98

Technical Details

  • Brand Name: Lenmar
  • Model Number: R2G802U
  • Item Height: 2 inches
  • Item Length: 8.5 inches
  • Item Weight: 0.55 pounds
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Product Description

Charger, R2G, AA/AAA, 2 Hour, USB Output and Alarm Clock, w/4 R2G 2150mAh NI-MH

Product Information

Product Dimensions 8.5 x 5 x 2 inches
Item Weight 8.8 ounces
Shipping Weight 14.4 ounces
Manufacturer LENMAR
ASIN B0010XU4IE
Item model number R2G802U
Customer Reviews
2.8 out of 5 stars 13 customer reviews

2.8 out of 5 stars
Best Sellers Rank #7,785 in Electronics > Accessories & Supplies > Camera & Photo Accessories > Batteries & Chargers > Batteries > Camera Batteries
Date first available at Amazon.com September 14, 2004

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By James Evans on February 6, 2009
Verified Purchase
I had seen some mention of this charger on other web sites, but never any reviews. I was looking for a new charger that had nice capabilities. Specifically, I wanted something that had separate channels for each cell, some sort of status indicator for each cell, and a charger that didn't take all night to charge, but didn't overheat the batteries charging in 15 minutes. Amazon came through with the best +shipping price as usual, so I took the chance and ordered this.

The Lenmar R2G802U is a nice product. Although not clearly stated, it comes with four pre-charged AA NiMH batteries. The charger itself comes with three power sources: a small wall wart, a cigarette lighter adapter for the car, and a cable to operate it from a USB port. (When operating from the USB port, charge times are increased, as there is a limit of how much current can be drawn from the USB port on a computer.)

Another neat feature about this unit, is that is features a USB charging outlet. Perfect for charging a bluetooth handset or other device that has a USB charging cable. One thing to note is that the USB charging outlet cannot work at the same time as the unit is charging batteries. But, if you plug a device in while you're charging batteries, they charger shuts off power to the batteries when they are complete and then switches on the USB charging outlet. That's a neat design in my opinion.

As for the included AA batteries, I haven't done much testing on them, but they work. I searched the web for some opinion on the Lenmar pre-charged batteries, but didn't find any info. I found less than stellar reviews on the non-pre-charged Lenmar batteries.
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Verified Purchase
This name of this product is a mouthful: "Lenmar R2G802U R2G 2 Hour Charger Includes USB Output and Alarm Clock with 4 R2G 2150mAh NI-MH for AA/AAA Batteries". Here is a breakdown of the components in the package:

- The base unit is a 4-cell AA/AAA charger that also functions as an alarm clock _and_ a USB power port. It has a very impressive-looking LCD panel (see the Customer Image I uploaded). In addition to four battery-status indicators, the panel also shows the present Time, Date, and temperature. The alarm clock function even has selectable ring tones.

- An AC adapter (input: 100-240V AC, output: 12V DC) to power the charger.

- A CLA (cigarette lighter adapter) cable to power the charger form 12V car battery.

- An USB cable to power the charger from your computer's USB port.

- Four Lenmar R2G (Ready-to-Go) AA NiMH cells, rated at '2150mAh'

So far, this package sounds like a great deal. But there are several issues you have to be aware of:

1. The USB output port only works when the charger is connected to AC adapter or 12V CLA. It cannot be powered by internal rechargeable batteries. (If this function is important to you, consider the Duracell Mobile Charger CEF23 instead)

2. You cannot use the USB port while charging any batteries.

3. The advertised '2-hour' charge time is only applicable when charging 1-2 cells _and_ when the charger is powered by AC adapter or 12V CLA.
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When the batteries are inserted into the charger the cover cannot be closed, so it's a pain to carry with the batteries inside.

The USB output for charging phones, etc., is not powered by the NiMH batteries, though this would have been a simple feature to include, since 4 NiMH batteries provide 4.8V to 5V. The packaging does not state that the USB port is only operational when the unit is plugged in, with the batteries fully charged. If you're looking for a combination AA/AAA charger and power bank then this is not the product you want, look at products from Tenergy like the Zap CP4-AA Power Bank, which is less expensive and more functional, though it lacks the alarm clock and temperature functions.

The manual is poorly written, referring to "charging plates" that are not related to AA/AAA chargers, only to Lenmar's chargers that can charge proprietary Li-Ion packs.

The packaging states that the batteries are charged and ready to use (like Sanyo eneloop batteries), but this was not the case. The manual does state that the batteries must be charged prior to use.

The temperature feature on the alarm clock really ends up telling you the temperature of the batteries that are being charged, not the surrounding air temperature.

A poorly designed, poorly documented product. I returned it.
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Verified Purchase
This has been our go-to charger for AA & AAA batteries. It seems to charge batteries more fully than all the chargers that came with our batteries, and it won't overcharge them once they're charged. Can't vouch for the USB or alarm clock functionality, but it's a first rate charger for the smaller batteries.
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