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Sharp HC4500/4600 battery replacement - attempt!
Рет қаралды 726
5 ай бұрынThe Sharp HC4500 and HC4600 share the same rechargeable NiMH battery pack without the option to use disposable cells. Sadly after 20+ years all of these batteries have long since leaked and no longer hold charge.
In this video I am attempting to re-cell the battery but without much luck, if you know how to get this to work please let me know 😀
@DIGITAL_DECAY.EXE_ 5 ай бұрын
Can't wait for the no smartphone episode. I daily drive a Nokia 6300 & Dell Axim x50v PDA. The hardest part of living without a smartphone is the fact that feature phones are bad at texting lol. I don't remember how we dealt with it back in the day lol.
@HandheldComputing 5 ай бұрын
The x50V is an amazing PDA, good choice! I'm looking forward to having less distractions, I won't be sending long texts thats for sure!
@Rummelsdorf 5 ай бұрын
Very good and informative video - as always. Glad to be a channel member :)
@HandheldComputing 5 ай бұрын
Hello @Rummelsdorf!!! Glad you enjoyed the video and thank you so much for becoming a member!
@ctcards2636 5 ай бұрын
I rebuilt one of these packs. I didnt have any issues. I'll have to finish theis whole video and see if i see anything your missing.
@ctcards2636 5 ай бұрын
That orange light should NOT be blinking. That light stays solid orange. And then when its charged it turns solid green. There should be NO blinking. So something is going on here. Id investigate that.
@ctcards2636 5 ай бұрын
You had any luck ?
@HandheldComputing 5 ай бұрын
So maybe there is an issue with the unit 😒
@HandheldComputing 5 ай бұрын
Can you confirm there are only 3 battery connections on the unit? Thanks Huw
@ctcards2636 5 ай бұрын
3 connections. Yes. @@HandheldComputing
@RichsRandomRetroReviews 5 ай бұрын
Well I'd have a problem with this - I don't own a hair dryer so I'd never be able to get in the battery case lol. Awesome video as always - I liked the introduction and the magnet idea is inspired!
@HandheldComputing 5 ай бұрын
Ha ha! Yep the magnets make it super easy for testing circuits. Hoping I can get the HC4500 working for a proper video!
@HandheldComputing 5 ай бұрын
Ha ha! Yep the magnets make it super easy for testing circuits. Hoping I can get the HC4500 working for a proper video!
@paulwalker427 5 ай бұрын
great video chap
@HandheldComputing 5 ай бұрын
Glad you enjoyed it
@nevarDeathEHW 5 ай бұрын
Thank you for clarifying that this is not, in fact, "wall socket computing" 🤣😂
@HandheldComputing 5 ай бұрын
Ha ha, I don't want people to get confused 😂🤣😂 Thank you so much for becoming a member, I really appreciate it!
@nevarDeathEHW 5 ай бұрын
@@HandheldComputing The first video I saw about a month or so ago with a Join button, I hit it and thought it went through, I was so excited! Then you were mentioning other people in videos after that and I was like "Oh well, at least I'm supporting the channel" then on this video I thought I ought to check and NOPE, no receipt or anything. Never bothered to look down and see if the Join button was below videos or anything 🤦🏻♂I'm ready for merch (Stickers hoodies) whenever you are 👍🏻💪🏻
@HandheldComputing 5 ай бұрын
Thank you so much for your support! You will of course get a mention in my next video! Merch? I hadn't really thought about that but maybe I should! Glad you are enjoying the channel 😃@@nevarDeathEHW
@user-hv4kt1xg1c 5 ай бұрын
The best option is to disassemble the device and sketch the section of the circuit responsible for power and charging. Many issues will be resolved.
@HandheldComputing 5 ай бұрын
Now that is an excellent plan!
@TheKsax 5 ай бұрын
I got a plan on remaking battery packs for some of my vintage handheld devices, since I want to make easily removable cells and USB-C power input, so I can play around with any devices easily, and when I am done, it is easy enough to remove a cell put it safely to storage. I got Toshiba Librettos, which need new battery packs badly, unfortenatly I dont have Sharp HC4500 for reference, so not sure what could be wrong, but perhaps batteries wired a little differently to what you did. My work on new battery packs will take awhile, since I got a large backlog of projects, and they basically would need to be remade from scratch to house new cells and new electronics.
@HandheldComputing 5 ай бұрын
Let me know how you get on, I have the CT50 and plan to re-cell the battery but didn't think of making them removable 👍
@TheKsax 5 ай бұрын
The issue I encountered, is that cells size, which Libretto used are no longer made. I could have failed in the search for it, but no major electronics supplier I checked had them. So using different cells, a smaller or fewer, but bigger cells could be a sollution, but battery might need a voltage booster and ideally proper battery protection. And if cells are removable, then storage is much less of an issue, while keeping laptop look complete.
@HandheldComputing 5 ай бұрын
I haven't opened up the battery pack, but it looks very much like it will contain 3 18650's - just be aware that if you buy ones with built in charge protection they are longer and so wil not fit!@@TheKsax
@DaltonTk423 5 ай бұрын
I wonder if one of the negative (-) wires needs to be connected in between the cells so the machine can see the voltage of the individual cells. To me it seems like the machine needs positive (+) on one end of the pack, negative(-) from the other end and the third wire goes to the casing of the first battery which would be a connection in between the 2 replacement batteries you have on the table. That way the machine can see voltages of each individual battery.
@HandheldComputing 5 ай бұрын
That would make sense, I will give that a go before I disassemble the device and go looking for failed capacitors etc.... 😃
@kode3020 5 ай бұрын
I had a similar problem with my nec 900c. I used a 7.4v 2s lithium ion battery. The battery would have a charge but just not enough. There's a voltage cutoff and it can be plugged but it won't charge. I had to recharge the batteries with another and then plug it into a lipo charger. I make sure never to leave it plugged into the palmtop or it will kill the battery due to parasitic draw. I just unmount the battery and it can stay charged alot longer. I hope you can resolve the issue.
@HandheldComputing 5 ай бұрын
Its a massive issue with Li-ion batteries, most charge circuits won't charge them if they drop below 2.5V - you can sometimes revive them like you have done. Not an issue with NiMH, they can go totally flat with no harm to the cell. Going to keep trying, as I want to use this PDA!
@kode3020 5 ай бұрын
@@HandheldComputing Good luck! I hope you solve the issue. Being able to enjoy them again is always worth the extra work in my opinion.
@HandheldComputing 5 ай бұрын
It sure is! They are meant to be used, not placed in a museum@@kode3020
@johndopedo3298 3 ай бұрын
Do you have a video on how to reinstall Windows CE? I have done all Windows (but never CE), with the operating system (iso file) on a CD or USB drive. My device is not booting, saying "no nk.nbc found on CF card, DOC.CE load failed." Yes the device has an application running on CE, I believe, and the app runs from the CF card.
@HandheldComputing 3 ай бұрын
Most of the consumer devices using CE have it stored on a ROM chip. Some netbooks and commercial devices can be re-flashed with new versions of CE but it isn't something I have done. Have a look on www.HPCfactor.com and ask on the fourums there, I'm sure the friendly members there will be able to help 😃
@user-hv4kt1xg1c 5 ай бұрын
There may be a microswitch installed inside the case, so the batteries on the wires may not work.
@HandheldComputing 5 ай бұрын
Good thinking! That did occur to me as there is a prong on the battery case. If there is a switch I think it may be broken though - going to do a disassembly I think so I can get it working!
@EirikrTinkerTries 2 ай бұрын
Random… it’s not a handheld but it’s tiny for its age… can I send my Toshiba T1950CT for you to fix, wherever you are, you fix and make a video out of it and yeah. Happy times
@HandheldComputing 2 ай бұрын
Wow, that's a nice ultraportable from back in the day, what's wrong with it?
@fradd182 5 ай бұрын
That flicker is so strange, almost as bad as CRT.
@HandheldComputing 5 ай бұрын
Its a CCFL backlight so you always get some flicker on camera. In person there's no flicker and honestly its a really nice screen!
@GoncaloRijo 5 ай бұрын
Try with a power supply? Different cells?
@HandheldComputing 5 ай бұрын
Good plan! Tried different cell, will have a look for a different power supply!
@vintagemoderncomputing 5 ай бұрын
Hmm. 🤔
@HandheldComputing 5 ай бұрын
Humm indeed, I am stumped!
@vintagemoderncomputing 5 ай бұрын
@@HandheldComputing I take it the machine doesn't have a controller like later laptops.
@HandheldComputing 5 ай бұрын
I don't think so, no need for voltage controller as its NiMH so they can be run flat and its too early for EEPROM chips to record the charge state@@vintagemoderncomputing
@vintagemoderncomputing 5 ай бұрын
@@HandheldComputing Aaah.
@HandheldComputing 5 ай бұрын
Aaah indeed!@@vintagemoderncomputing