Friday, October 2, 2009 , Posted by Admin at 12:35 AM
The Logitech Freepulse wireless headphones have a "non-replaceable" Li-ion polymer battery. Of course, once the battery runs out of juice, that makes it a very expensive paperweight. Repair fix!
- Battery is located on the left headphone, the one without the power button and power plug on it
- Removing the small screw on the inside of the ear piece.
- The screw is a tiny Allen Wrench head, smaller than my smallest wrench, a 5/64.
- I was able to use a small flat head screw driver to turn the screw, the screwdriver head was approx 1mm.
- There is also a small metal collar at the end of the headphone
- use a small flathead screwdriver to slide the collar onto the rubber wire connecting the headphones.
- Once the screw and collar are removed, you can force a screwdriver into the gap in the plastic between the top and bottom pieces of the headphone, and pry the two main pieces apart.
- There will be some resistance, but nothing seemed in danger of breaking when I pried them apart.
- Remove the battery packet
- The packet is glued to the side of the unit. I was able to pry it off, without the packets foil ripping. Probably doesn't matter if it does rip, since it's now a used up battery.
- It's connected by a small remove-able electrical plug that offered some resistance, but came off cleanly.
- Here is the only hit I found for the battery part number, on the Online Certifications Database.
- The battery size is approximately 25mm x 25mm. The headphone will not hold a larger battery.
- The connecting cable has a red, black, and white cable connected to a small power connector.
- It is important that the new battery be 3.7v.
- Matching the 265mAh number is not important. That just describes the battery life on a charge.
- Disposal of battery
- from http://forums.all-battery.com/index.php?showtopic=279&pid=558&mode=threaded&start=#entry558
- How do I safely dispose of dead or damaged Lipo packs?
- If possible, discharge the pack down to zero voltage using a motor, light bulb, etc. Next gently puncture the outer cases of the cells and let it sit in saltwater overnight. Remove 24 hours later, wrap it up in a plastic bag and toss in the trash.
- A replacement for this battery:
- P/N AHB472625PST
- Li-ion polymer
- 3.7V 265mAh
- Made in China
- all-battery.com is an excellent source, with specific dimensions,
- The best current fit is a 25x20x5mm Tenergy Polymer Li-Ion Battery 3.7V 250mAh