All Kobo e-book readers use a lithium-ion Li-ion battery. Not all Kobo e-book readers have the same battery life. It is not easy to test battery life on an e-book reader since it depends on a few factors. Battery life primarily depends on usage. In other words, it depends on how much time per day on average you spend reading on an e-book reader. If you are a casual reader, your Kobo battery may last up to six weeks. If you are an aggressive reader who spends hours a day reading books, your Kobo battery may last only a couple weeks.
You can significantly increase Kobo battery life by turning off Wi-Fi while reading books. You need to turn on Wi-Fi when downloading e-books to your Kobo device.
Once you finish downloading books you do not need to maintain your Wi-Fi connection since your book is stored in your Kobo device. You can also improve battery life by keeping the brightness of the front light at a low level. If you use a custom-made Kobo case SleepCover, it will automatically turn e-reader in sleep mode when you close it and therefore save battery consumption.
I used this. New battery. You'll need a new battery duh! More importantly, you'll need a LiPo battery of the same size as the one that's in your Kobo right now. I first tried to do this by measuring the size of the battery holder, and ordering a battery based on those measurements.
That failed as, even though my Kindle now worked, I couldn't replace the back cover anymore. Then I figured out that the numbered code on the battery see picture, I had unfortunately torn of the wrapper from the battery before making a picture isn't just a product number, it's the size of the battery.
In this case the numbers are , meaning that this battery is 4. And just this number code turned out the best way to find a new battery of exactly the right size, in the end I ordered this one and it works great. Check the number on your old battery to be sure! Opening up the Kobo Touch is pretty easy. Looking at the picture that I took from TechCrunch's review on this device, you can see a crack running around the backside.
Pressing on this crack and prying a nail behind the back cover, you can separate the back cover from the bezel and the internals. Look at this YouTube video to see someone doing this. This will give you a view of the main PCB board, and will clearly show you the battery and the connector connecting the battery with the board.
The battery is glued in the holder, so you will need some force to remove it, do this as follows:. Time to 'unwrap' your battery. Take off at least the top part of the black wrapping around your battery. This should be easy and will reveal a metallic battery cell with black isolating tape around the top edge where the wires come out.
This tape needs to come off as well, but be carefull not to damage the small board beneath it, we'll need it later. The small board contains two connections for the positive and negative battery terminals, it also contains an NTC. Probably, this serves to measure battery temperature to prevent the battery from overheating.
And presumably, this is what the third wire in the connector is for. This means that the Kobo expects the NTC to be at the other end of this wire, so in replacing the battery you have two options: either find a general LiPo battery and stick this connection board on it, or find another three-wire LiPo battery that also has an NTC. To retrieve the board from the battery, take off the isolating foam strip. This will reveal the battery terminals, desolder the connections between the battery and the board.
My new battery came looking like this, it has its own connection board with just two connection wires and no NTC.
This board needs to come off. So: take off the tape, straighten out the battery terminals they were folded in my case , and desolder the connections between the battery terminals and the connection board. Solder the Kobo connection board to this new battery. In my case, the battery terminals and the connections on the Kobo connection board weren't evenly spaced.
This meant that I had to ben one of the battery terminals slightly to make it line up. This introduced a new problem though, due to this misalignment, part of the terminal would contact the connections of the the wires to the board, causing a short-circuit. To prevent this, I used some electrical tape to insulate the battery terminal, solving this problem. Put the new battery in the battery holder, it will probably stick slightly to the glue residues that are still in there.
Make sure the connection board fits in there as well, and has the connection cables on the side of the recess in the battery holder. Note: In my case, the e-reader initially wouldn't turn on. However, after connecting it to a computer it turned on almost straight away. After that, turning it on, off or in standby is no problem and starts again every time without having to connect it to a computer first.
Thanks for this very useful instructable. Searching for "mAh Battery For kobo NB " on aliexpress found a perfect replacement for my kobo touch. Since the old and new batteries both had two wire connectors I did not transfer the small board between batteries as you did. Reply 2 months ago. I replaced the battery with the model needed for that one SP, mAh, 90x55x3. I've tested to buy another battery from another shop with the same result. Don't know from where comes the issue then Thanks in advance.
That doesn't sound too bad. I don't actually know how many hours I get but I know that I get about 8 days of good reading per charge At about 2h a day so that's like 16 hours with only sleeping at night with WiFi on. With WiFi off and sleeping in the day I think I get about 10 days.
I used it pretty much every dayfor a good half hour to an hour. It also takes a bit for the battery to start fully working. I read about hours a day during the week, and maybe hours on the weekends I used to recharge every 2 weeks or so for the first few months And I never turn it off either, it's usually in sleep mode.
I also almost never use the wifi I use mine pretty much every day for about minutes. My Wifi pretty much never gets used and I tend to power it off instead of going to sleep mode. Definitely nothing but positive reviews of the battery life on my part. I've heard someone mention elsewhere on this forum that if you have an SD card installed the charge doesn't last as long since each time you start your KT from power-off mode it goes to check through the SD card using some power.
Also understandably, the more files you have on the card the more power it consumes each time. I have configured to auto sleep after 15 minutes and to power off after 45 minutes which is pretty useful for me, since I generally have three reading periods during the day. All my books are on my SD card and I get around 3 weeks out of a charge I guess.
I read on the average about 2 hours a day I guess. The hours vary a lot tho, today I spent about 6 hours reading on a Sunday , but yesterday only a couple of hours, during the week, probably less, say between and hour and 2 hours.
I go through books pretty fast though so it spends some time connected to to PC to load books. Whilst it's connected it's charging, so I expect that increases the charge life a bit maybe.
But then again it only spends say 5 mins connected, so I dunno.
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