Replacing the battery on a Sphero SPRK+
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- Опубликовано: 23 авг 2024
- I have a set of Spheros that have all come to the end of their battery lives.
The batteries have visibly swollen and they either won't operate off the cradle at all or give less than a minute before disconnecting. In this video I cut a sphero in half and replace the two batteries inside with Hubsan H107c batteries which have the same physical size but slightly less mAh (240) . The original battery is 3.7v 350mAh 1.3Wh 702035 151226-03S. While batteries are available from a variety of sources internationally, they are often prohibited from air transportation so you need to careful about what can be delivered!
The shell is destroyed in the process, and replaced with a flimsy Xmas bauble which is sufficient for general use but won't sustain the regular beating that the original can. Don't drop it or you'll be replacing the shell over again. Note, the silent sequences in the video are where it has been sped up.
Here is the site that I eventually succeeded in getting 30 batteries from www.alibaba.co...
So I am in the process of replacing a set of batteries now that my delivery has arrived. I have given up on using the baubles as my local supply dried up. I wasn't successful in R4Z0R84's acetone extraction, so I continue to crack the shells, now carefully in a vice rather than the time consuming and dusty dremel way. I make 3D printed shells with a translucent PLA+ filament. 9 done so far - it is rather a slow process to print the shells with each half taking about 3 hours to print.
thank you
that facebook message at 17 mins got me good, ours are about 5 years old, edit: got my batteries, used acetone(top ingredient) nailpolish remover and a cotton tip to run along the seam and it melted/destroyed the super glue in about one minute. Was able to use the shroud again. Batteries were a little too big.
I have a set of 30 batteries on order, which I hope will make it through the delivery service. My supply of 'baubles' dried up, so I am currently 3D printing shells. My first one didn't let enough light through to adequately see the aim light, but having shifted to a translucent PLA it is looking promising. Just waiting to see if the batteries come in within the size tolerance, and more importantly whether they actually get delivered. Will do an update if all goes to plan.
@@twictnet oh very nice I just did a search on eBay for clear bauble and the exact same ones you used are there, I'm just doing one first before attempting the other 14, the school's getting a new set since ours are 5 years old the new ones have many more features, if I can get these working for roughly $20 aud it's far cheaper than $333 for one, I look after 5 schools in Victoria so I'll be able to help them out with their old spheros as well, really keen to see what acetone does to the glue holding the original shells together.
@@twictnet my batteries arrived today, I went out and got some first ingredient acetone nail polish remover and used a cotton wool tip to go lightly around the seam of the sphero and it got in and melted the glue holding it together after about a minute, they then just fell apart without any tools to pull them apart or damage the shell, absolutely amazed but glad I don't have to get baubles anymore :)
I'd be interested in finding out more about how you got the shell apart. I have tried with acetone but just end up scraping out a wide channel and never got them to separate. (Diggers Acetone from Bunnings). Tried a gentle approach first with cotton buds but never go anywhere. I am still waiting on my next shipment of batteries, hoping they comply to the size I specified (aliexpress order). In the meantime I am making translucent 3D printed shells, which seem to work pretty well. I ran out of my supply of the baubles and have opted for printing a stronger version in PLA. The baubles are okay but there is a high attrition rate ;-( I switched my school over to sphero minis rather that replacing the SPRK+. Will work on resurrecting the SPRK+ but it is not a priority. Still the sphero chariot lesson doesn't work properly with mini's!!! ruclips.net/video/GmldVnCnQ44/видео.html
I replace the batterie on a sphero sprk, everything goes well, expect for one thing, as soon as I remove it from the base, it lost connection link. And I m unable to power it on with regulars methods of shaking it a little bit, like before when batteries where working well. I use bigger batteries they are 600mah, maybe that's the issue? After few hours it stop charging, solid blue light on the base and 'pink' LEDs on sphero... A bit weird, is'n it? Do you think it could be a kind of 'time protection' with the charging process? I charge him only once and got only 3.85 volts each batteries, total of 7.65 volts. Do sphero should turn on at this voltage? Or voltage is too low? So, anyway, i decide to try charge again to see how long it charge before to stop if not completely charged. Then try again. Thanks for sharing. ✌🏻
Hi Adam, I have done 20 of these. I had 2 that didn't work - I think they "bricked". I don't know why that may have happened. It could be the way the batteries first connected back up to the unit. I did manage to use the same battery pack and base with a different top and that was fine. So two definitely didn't like something. I had the luxury of enough working that I didn't really follow up to discover why. Even when on the cradle I could not link to them anymore as if the bluetooth had dropped. If you can link to it when it is on the cradle you may be in luck. Check the wiring that you didn't get one of the batteries incorrectly wired. Good luck.
Hello, I can't find a new case. where do i get it from? and which glue?
Depends on where you live, I have seen them sold on Amazon, but not much help for me in NZ. They were sold here in a discount store, but I can't get them anymore. I recently replaced the batteries in 15 spheros using 3D printed shells with translucent PLA. The translucent PLA is sufficiently clear to enable aiming the sphero. There are some free shell designs on thingiverse. I had to increase the size to 102% perhaps because of inaccuracy with the tolerances of my 3D printer. The 3D shells are much stronger than the Xmas bauble version. As for glue I just used a brush on super glue. However for the 3D shell, I have also smeared a layer of epoxy glue along the seem to strengthen it more.
Michael's (the hobby store chain -- they have 3" diameter snap fit transparent shells) I paid less than $1 each, and picked up at one of their stores to save shipping.
What a glue? Please
How much longer did the new batteries last?
They are still going strong. The issue we had was our technician had put the cradles on a time switch to charge each night. That is a bad move as it tricks the units into clocking charge cycles, they need to be left on the cradle to idle, and powered down completely and taken off the cradle for long term storage. With a time switch they bleed off power then recharge, whereas if left on-charge they just top up.
Exactly what batteries did you use because I can’t find them
702035 is the exact one used, you just need to get one the same physical size if can't get that. There was a shortage of batteries for a while so the Hubsan 107c was a substitute it had a lower maH. Depends where you live as to what will be available.
Thank you
I have just ordered some from here www.ebay.com/itm/304025704889?var=603178255237 - hoping they actually turn up...
@@twictnet those ones are very similar to the ones I got but were slightly too long(had to modify the internal case slightly) to get them to fit and fold the yellow part a bit, they still fit and last much longer though. So grateful to be able to get one of these going again for the school, I'll bring it into the school next Thursday when schools back and see if they want me to fix their others I'm just the specialist technician so it's completely out of my job description but I love tinkering haha 😂
@Caleb Webb The batteries I tried to order from eBay, got cancelled by the supplier. I order some others directly from AliExpress, and had to wait a short manufacturing time, then shipping. But got 30 successfully. However, I did insist that they worked to a specific size specification. Was happy with them.