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Battery problem
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<blockquote data-quote="SuPaSAINT" data-source="post: 119147" data-attributes="member: 21179"><p>I'm having the same problem. I've been Googling for the past 3 days and haven't really found any solution other than to buy new batteries. I was able to open up one of my batteries and manually charge it with a bench-top power supply to 12.6V (4.2V/cell) @ 0.125A (low current to reduce risk of fire/explosion). The battery is holding a charge which is good indication the cells are not totally ruined from over-discharging (albeit, likely has degraded capacity). Despite returning the pack to a stable state, the charging hub and USB air craft charger refuse to charge the battery. When inserted in the air craft, I can press once, press and hold for 2 seconds to turn the battery on, but the air craft will not power up. I did some more digging and discovered the battery management IC is a Texas Instruments part number (BQ9003). I couldn't find a datasheet anywhere for this IC. I believe the battery management IC sets a persistent error flag when over-discharged which renders the battery useless. To reset this flag would require an SMBus adapter and software, similar to what is shown in the two videos linked below. Cheapest I could find a TI EV2300 HPA002 pod was for $100 on eBay ($120 for two new battery packs on Amazon...). </p><p></p><p>Battery Mavic Air Repair (Remove Permanent Fail): [MEDIA=youtube]7_E2pkDMIaI[/MEDIA]</p><p>Battery Phantom 4 Repair (BQ30Z55) - Romanian Lang: [MEDIA=youtube]vzc_zV50HQw[/MEDIA] (This one is in Romanian, but you can auto-translate captions to English)</p><p></p><p>Here is a good summary of the issue:</p><p>[URL unfurl="true"]https://www.uncle.la/posts/dji-spark-battery-issue/[/URL]</p><p></p><p></p><p></p><p></p><p>Disclaimer: I do NOT recommend anyone attempt to manually recharge an over-discharged LiPo battery without first knowing what you are doing. There is a real risk of fire and/or explosion so precautions must be taken.</p></blockquote><p></p>
[QUOTE="SuPaSAINT, post: 119147, member: 21179"] I'm having the same problem. I've been Googling for the past 3 days and haven't really found any solution other than to buy new batteries. I was able to open up one of my batteries and manually charge it with a bench-top power supply to 12.6V (4.2V/cell) @ 0.125A (low current to reduce risk of fire/explosion). The battery is holding a charge which is good indication the cells are not totally ruined from over-discharging (albeit, likely has degraded capacity). Despite returning the pack to a stable state, the charging hub and USB air craft charger refuse to charge the battery. When inserted in the air craft, I can press once, press and hold for 2 seconds to turn the battery on, but the air craft will not power up. I did some more digging and discovered the battery management IC is a Texas Instruments part number (BQ9003). I couldn't find a datasheet anywhere for this IC. I believe the battery management IC sets a persistent error flag when over-discharged which renders the battery useless. To reset this flag would require an SMBus adapter and software, similar to what is shown in the two videos linked below. Cheapest I could find a TI EV2300 HPA002 pod was for $100 on eBay ($120 for two new battery packs on Amazon...). Battery Mavic Air Repair (Remove Permanent Fail): [MEDIA=youtube]7_E2pkDMIaI[/MEDIA] Battery Phantom 4 Repair (BQ30Z55) - Romanian Lang: [MEDIA=youtube]vzc_zV50HQw[/MEDIA] (This one is in Romanian, but you can auto-translate captions to English) Here is a good summary of the issue: [URL unfurl="true"]https://www.uncle.la/posts/dji-spark-battery-issue/[/URL] Disclaimer: I do NOT recommend anyone attempt to manually recharge an over-discharged LiPo battery without first knowing what you are doing. There is a real risk of fire and/or explosion so precautions must be taken. [/QUOTE]
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