https://community.element14.com/technologies/experts/ Have questions for our community members? Ask the experts here!en-USTelligent Community 12https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238603Fri, 09 Oct 2026 11:55:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d3264122-0152-4079-90d5-65a0d533044cobonesNot on that side, the components are on the other one: The three big ones appear to have the same 8205A marking, consistent with TSSOP8 mosfethttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238600Fri, 09 Oct 2026 11:05:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:1423c0df-df51-41d6-b915-26eb5256973amichaelkellettI do ! Are there any other bits on the little board ? MKhttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238597Fri, 09 Oct 2026 09:42:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f6ef8978-ecfd-430f-8cc2-9ab27424b80fobonesI gently removed the kapton tape around the BMS and was able to take what I think is an interesting picture: To me it looks like the white wire is tied to ground, effectively making thermal management a joke because the NTC thermistor simply is not there! Do you make the same conclusion here?https://community.element14.com/technologies/experts/f/forum/10717/miller-maxstar-200dx-pcb-assmbly-no-247321b/238558Tue, 06 Oct 2026 07:16:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f1d039ba-3e7b-4aab-9606-6fb0dd0fa60dacdc90I would expect there is a semiconductor that is also damaged or dead.that is directly connected to that resister. are you able to draw the circuit what is connected to that resister.https://community.element14.com/technologies/experts/f/forum/57329/i-need-a-datasheet-or-reference-of-this-chip/238556Mon, 05 Oct 2026 14:34:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:594c84f4-62ad-424c-b566-8db1760e7eebcstantonLocking duplicate thread of ARC760-B pin informationhttps://community.element14.com/technologies/experts/f/forum/10717/miller-maxstar-200dx-pcb-assmbly-no-247321b/238542Sun, 04 Oct 2026 19:58:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c368b8bc-b322-4e84-8eb8-d3281989f6c5rapsodaQue tal, tengo la misma tarjeta con el mismo problema, tal vez encontraste el valor de la resistencia?https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238541Sun, 04 Oct 2026 16:41:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:369f7205-6636-4d72-af64-959d34e39961obonesAs I'm on the subject, would transferring the existing management board to a brand new battery would be worth considering? This would have the advantage of keeping the connector and the thermistor connection, but I'm not sure how safe/easy it is to do so. Note: the replacement is already ordered, this is more of a "just in case" follow up questionhttps://community.element14.com/technologies/experts/f/forum/57329/i-need-a-datasheet-or-reference-of-this-chip/238553Sat, 03 Oct 2026 08:54:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:a05b0ccc-77da-4e99-9afa-0713dd4996d9SamW1993Thank you for your effort. This information is useful to me, but it lacks pin details and omits the differences compared to the ARC760-B.https://community.element14.com/technologies/experts/f/forum/57329/i-need-a-datasheet-or-reference-of-this-chip/238552Sat, 03 Oct 2026 04:49:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:99c63f90-159a-4222-93b5-f2fbc4c45c75manojroy123Very Intresting. I also want to search for datasheet of old ic. I will definitely give it a tryhttps://community.element14.com/technologies/experts/f/forum/57321/arc760-b-pin-information/238528Fri, 02 Oct 2026 18:26:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f7460f21-ec76-4561-8db0-16873733f116kk99Here is a bit more information about: ARC-765 Ultra 160 SCSI-IDE Bridge. community.element14.com/.../6278.arc765.pdfhttps://community.element14.com/technologies/experts/f/forum/57329/i-need-a-datasheet-or-reference-of-this-chip/238551Fri, 02 Oct 2026 15:35:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:11dd023d-516b-42b2-9d04-e75b7da8e08ckk99Here is a bit more information about: ARC-765 Ultra 160 SCSI-IDE Bridge. community.element14.com/.../arc765.pdfhttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238527Fri, 02 Oct 2026 13:05:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c13052d6-95e1-4137-a4ee-39fdd85cd47fgeralds....measuring under defined load and calculation using the datasheets. That is what you can. Here in 2004 there was a DY project: https://de.elv.com/p/lipo-die-neue-akku-generation-P201134/?itemId=201134 https://de.elv.com/p/lipo-die-neue-akku-generation-P201134/?itemId=201134&utm_campaign=affiliate_exitintend_dehttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238526Fri, 02 Oct 2026 12:19:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:f6876c8e-d091-457a-ab6c-ac2ac3a9e4f2obonesYes, that kind of price is what I found as well. But one must be very careful, most stocks in that price range are outside the European Union and thus incur a very real risk of additional taxes upon receipt. And I made the same conclusion as you, there is no point in investing in testing equipment just for a one off. If it had been doable with gear I already own, it would have been easier.https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238525Fri, 02 Oct 2026 12:10:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:53fa8a57-745a-4d8a-a284-eac7574b585bgeraldsHi, look here, at Ebay: https://www.ebay.de/itm/188265300885?msockid=0ff5f9a7cf4368d502a5ef53ce31691b original ZN-106065 LiPo battery about 34,81 EUR, incl. I think, ok, well, an expensive battery test bench would be nice, but why? - just for using once? 34,81 Euro tells other language. 8 parts are on stock. The Eschenbach website of the Visolux Digital XL FHD. https://www.eschenbach-vision.com/de-DE/produkte/visolux-digital-xl-fhd/165511https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238521Fri, 02 Oct 2026 09:26:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:89867064-d5c4-4026-9234-f52e99b46e44michaelkellettYou can buy a similar rated LiPo battery from Amazon for about £10. It won't have the third (white) wire. According to Google AI the third wire will be for a thermistor. You can check this on the two batteries you have - I assume that the thermistor will use the black wire as common but you should check (no volts between black and white, same volts between red and white and red and black with a high impedance meter.). Then get a suitable thermistor - you might find some info as to what is typical on the web but you certainly don't want to characterise it by heating up a battery ! If the device uses two batteries you should replace both of them so that the new ones at least have a chance of matching. Kudos to you for trying to sort this out - I hate suppliers who try and rip you off for spare parts. MKhttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238520Fri, 02 Oct 2026 08:59:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:01c885a5-c780-4864-869b-0f3ef23da2caobonesThose batteries are from my neighbor's Visolux Digital xl fhd which includes its own charging circuit. I tried starting it without any batteries while plugged to its AC adapter, but it stops right after the boot screen so I believe it needs to properly functioning batteries installed to work (hence the third wire, I believe). I had that 4 quadrant bench tool in mind as I read about it in a previous roadtest, but yes, it clearly is way too pricey for me. The seller's support was asked about and came back with a 230€ quote that I feel is completely off the mark, even edging on the side of elderly abuse. I mean, they already managed to get them to buy a new AC adapter for 104€ after three weeks of "inspection", which of course did not solve the situation. So here I am, trying my best to keep costs at a reasonable level.https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238519Fri, 02 Oct 2026 08:39:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8ee508a2-cf24-422b-a1bd-85ed94bf20ddmichaelkellettA full charge and discharge cycle is the only way to know for sure how good a LiPo is. A visual inspection first will save you time and danger, get rid of the bloated one ! To do the measuring properly you need a charger or a PSU that knows how to work like a charger and an electronic load which records the voltage during discharge and cuts off at the right cell voltage. For a good characterisation you need to be able to measure battery low frequency impedance during charge and discharge. A nice box that does it all will cost you £5k ish from Keysight, Keithly or R&S (NGM202 is nice). About the cheapest way is to use a programmable bench PSU for the charging and monitoring, there are some quite cheap electronic loads - the cheapest from Farnell is £235. You could make a load yourself. Then you will need some software - but you can get Claude (or other AI) to write that in Python quite easily. But by now you will be thinking that even in France buying 2 new batteries might be easier ! What will be charging the battery when you use it ? MKhttps://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238516Fri, 02 Oct 2026 07:21:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:a3813858-3e21-4cf7-8e6c-89633e9f110fgeraldsManufactured in October 2019; they are very old. I recommend buying new accus. How often were they discharged/charged? What was the ambient temperature throughout that time? In the photo: the right accu is inflated.https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238515Fri, 02 Oct 2026 07:18:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:5113e6c9-9ae9-4507-a606-6669d21b41b8shabazPuffed up batteries continue to work : ) But you know you need to replace that one. What's not good is if the non-puffed up one is below about 3.0V, because then it's a higher risk to try to charge and use that. In other words: below 3.0V, replace. Above 3.0V and not puffed up: use your judgement, since you have no way of measuring and comparing internal resistance with a spec or known good battery. (Personally if it were me, if in any doubt, I'd replace it, because that is quite a high capacity cell).https://community.element14.com/technologies/experts/f/forum/57322/how-to-determine-the-health-state-of-a-lipo-battery/238514Fri, 02 Oct 2026 07:16:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:19d4f069-c975-4edf-ba30-0ff9060c516bobonesYeah, I read about that too, and it feels incredibly dangerous. If I was to try it, I would definitely do it only in a fireproof setting and only to see what kind of flames a LiPo battery can generate. And I would definitely NOT use such a big one for that.