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14.4V 3600mAh NiMH Battery Pack for IRobot Vacuum Cleaner 400 series such as Roomba 4905 --New!! A Screwdriver included | 
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| Brand: Tenergy
Category: CE
Buy New: $29.99
New (3) from $29.99
Rating:  4 reviews
MPN: Robot14.4V3600
Model: Robot14.4V3600
UPC: 851197001994
EAN: 0851197001994
ASIN: B001AG4EHI
Promotion: Data not available Terms and Conditions
Availability: Usually ships in 1-2 business days
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| Features:
| • | Compatible with all Roomba FloorVac models. | | • | Longer running time - this high power, high capacity NIMH and has 10-15% more running time than OEM battery pack | | • | The battery is designed for exactly replacing inside battery pack for IRobot Vacuum cleaner. e.g Roomba APS 4905 battery. | | • | Can be recharged up to 1000 cycles. | | • | To replace inside battery, you need to take off 4 screws on the case, then put new battery with solid connection. Screwdriver is included |
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| Editorial Reviews:
Product Description
Features and Benefits * NIMH High Power 14.4V 3600mAh rechargeable battery * 70 oC thermistor installed in the battery pack. Power will be cutt off if battery temperature beyond 70oC during charging to prevent from over charge. * 6" length wires is pre-installed for easy installation. * The battery is designed for exactly replacing inside battery pack for IRobot Vacuum cleaner. e.g Roomba APS 4905 battery. - To replace inside battery, you need to take off 4 screws on the case, then put new battery with solid connection. - Please make sure polarity of battery pack. Red wire is always connect to positive * TECHNICAL SPECIFICATIONS: - Votlage: 14.4V, made of 12 pcs High quality NiMH sub C cells. and packed by 2x6 configuration - Capacity: 3600mAh - Max. Discharging rate : 10 C at 33 A - Dimension: 136 mm L x 45 mm W x 45 mm H. - Weight: 38.5 Oz. * Battery Installation Instruction: Step 1: Loose up all srews on the top cover of the Roomba Advanced Power System. Tool: You need a triangle screw driver to do so. Step 2: Open and remove the top cover from the power system, which may be glued. Tool: You may need a flat screw driver to open it carfuelly Step 3: Remove the old battery inside. Three are wires with metal contact connected inside. You can remove the wires by pulling up the contat or cut wires off. Take a note of the wire connections Step 4: Put new battery into the battery case and solder three wire back to metal contacts. Follow the note taken in Step 3 or the following details for re-wire: - Red wire : battery positive - The red wire must go to the terminal farthest away from the battery - Black wire: battery negative - metal contact near edge - White wire: temp sensore - metal contact on other side Step 5: Put back the cover Step 6: Screws on the cover
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| Customer Reviews:
 Know this before you buy! August 22, 2008
I thought this battery would be better than the original NiCad battery given that it is NiMH and 3600mAh. But it was not. On a full charge it works for 110 mins. The original NiCad when new worked 120 mins. Not bad, but not as advertized and I worry that it will not last as long either.
I am glad I did this, but before you buy any battery you replace yourself, take apart your old battery case first if you can. It is pretty tricky and you may end up damaging the case so bad that it is not repairable. Also you will need to do some soldering yourself.
Good Luck ;)
It works great but installation is tricky. August 20, 2008
As iRobot charges $70 for a replacement APS unit (case with batteries), I thought that I would try installing my own replacement batteries into the APS case. After ordering, the batteries arrived quickly and in good condition, but no instructions were included. The supplied screwdriver was a little small for the triangular screw heads holding together the APS case. (I could have easily stripped the screwdriver head if I used too much force.) The replacement batteries are very slightly smaller than the "stock" batteries in the APS, but fit in snugly enough. The replacement batteries appear to have a higher capacity that the original batteries (when new), as my Roomba can run for a longer period before needing to recharge.
However, opening the APS case was a tough task! After removing the screws, I used a very sharp utility knife to repeatedly score glued seal between the APS case and its lid. Eventually, I was able to work in a very small flathead screwdriver to pry apart the case. As some parts were glued very well, I had to continue to use the utility knife to score then cut apart the glued case. Eventually I could work in a larger screwdriver to pry open the case a bit more. One false move, the lid will crack - so it is critically important to the patient and work at it diligently. I spent about 20 minutes opening the APS case.
Installing the replacement batteries was a snap ... I cut the wires from the old battery pack and soldered in the new replacement pack, sliding over the supplied electrical insulators over the solder unions. I screwed the APS case back together, recharged the Roomba overnight ... and everything has worked well! At least next time the batteries need to be replaced, I won't have to spend so much time getting the APS case open!
 WORKS GREAT!! You need to know the details before you do this! August 1, 2008
7 out of 7 found this review helpful
You need to know that iRobot corp. makes it difficult to change this battery. After removing the screws, I found that the yellow battery case lid is glued to the bottom of the case. You need a couple of straight, small screwdrivers to slowly tap open the glue seam much like a diamond cutter uses a tiny chisel to tap cut a diamond. I had to tap the seam every 1/4 inch to break it loose. Hit it too hard and your cost savings are gone if you break the case at the attachment points - you would need to buy the whole battery pack - so only do this if you are careful and patient. Removing the old battery pack also is challenging if you are not the careful type as it is glued to the base of the case internally. Cutting the wires and soldering the leads is easy but there is no room for any other attachment method so you had better be confident in your soldering skills. This is not a job for the impatient person and you had better have all the right tools but since I am a nerd geek, I enjoyed the challenge and IT WORKED GREAT!! CHOOSE YOUR BATTLES AND KNOW YOUR SKILLS and if this sounds fun and challenging (like I do), it is a great way to save $40.00 AND set it up to do future battery replacements more easily.
A "new" battery for less than half the cost. June 23, 2008
10 out of 10 found this review helpful
My Roomba would only run a maximum of 10 minutes per charge, so I suspected the battery was the issue. I priced out replacement batteries, but it seemed the cost was prohibitive considering I could buy a entirely new Roomba for only $25-$30 more than the battery itself.
I finally located the Tenergy replacement cells and thought this was a good option. I replaced the cells of my Roomba APS battery (the yellow one) with minimal effort. I removed the screws of the battery case with the triangle shaped screwdriver which was included with the kit. The case of the battery was a little difficult to pry open but once it was I simply cut the three wires from the old battery and removed it.
I then soldered the new battery pack leads into place. There are three color coded leads (red, black, white) and you just need to match the colors. I suppose it wouldn't be absolutely necessary to solder these, but I didn't want to deal with a loose connection down the road. I also used a small piece of heat-shrink tubing on each lead, but electrical tape would work also.
Finally, I screwed the case back together. Note that the replacement cells were a tight fit into the case, but with a little adjustment to the position of the leads I was able to get the case back together with no major issues. I then used a multimeter to measure the voltage at the prongs of the battery and confirmed my connections were working. The new battery measured almost a full volt higher than my old one even after the old one was fully charged, so I am confident this will resolve my issues and thus far it appears that it has.
I run my Roomba while I am at work and haven't had an opportunity to time it yet, but I can tell by the amount of dirt in the bin and the tracks on the carpeting that it is back to it's old self. Based upon the size of the area it is covering, I would guess it is running at least an hour on one charge, so I have no complaints about battery life at this time.
I have no way of knowing if the lifespan of this battery will be better than the factory battery, but considering the factory one only lasted about a year I surely hope so. All things considered it was well worth my time to replace the cells as the five minutes it took saved me at least $30-40. In fact the longest part of the entire replacement was waiting for my soldering iron to heat up.
My only complaints are that there were no instructions included (not that I needed them, but I can see some people might find them beneficial) and the battery was shipped in a non-padded USPS envelope rather than a proper box to protect it from shipping damage.
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