Acidsnow Posted July 16, 2020 Share Posted July 16, 2020 Evening all, are the listed capacities accurate? Noticed last week after charging two 4s batteries, both listed as 5000mAh but fully charged my charger shows 4000ish. Again, just now charging a new 2s, listed as 5500mAh it's topped out and the charger is showing just over 4200. Is this normal? Or is it because they're new, eventually sorting themselves oot after a few cycles? Alternatively are we being short changed? Or even over charged! Ah'll get ma coat! Quote Link to comment Share on other sites More sharing options...
Gampla Posted July 16, 2020 Share Posted July 16, 2020 Did you go a balanced chargeSent from my G8341 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Acidsnow Posted July 16, 2020 Author Share Posted July 16, 2020 Ah did indeed Gampla, watched like a paranoid hawk just in case like! Quote Link to comment Share on other sites More sharing options...
Gampla Posted July 16, 2020 Share Posted July 16, 2020 What charge amp did you select Sent from my G8341 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Acidsnow Posted July 16, 2020 Author Share Posted July 16, 2020 All done at 5amps. Quote Link to comment Share on other sites More sharing options...
Gampla Posted July 16, 2020 Share Posted July 16, 2020 Some are too high and too low if the battery says 4000mah needs to be done at 4amp charge it at 5amps would make it quicker but with a risk of destroying battery Sent from my G8341 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
Jumper Posted July 16, 2020 Share Posted July 16, 2020 was it flat or was it already at storage charge? Quote Link to comment Share on other sites More sharing options...
Acidsnow Posted July 16, 2020 Author Share Posted July 16, 2020 All done from a storage charge Jumper, on all three packs. After the chargers done, the shown capacity does creep up slightly but ah'd be waiting a day or two for the numbers to make any sort of inroads on the missing 1000mAh! Quote Link to comment Share on other sites More sharing options...
Jumper Posted July 16, 2020 Share Posted July 16, 2020 38 minutes ago, Acidsnow said: All done from a storage charge Jumper, on all three packs. After the chargers done, the shown capacity does creep up slightly but ah'd be waiting a day or two for the numbers to make any sort of inroads on the missing 1000mAh! in that case its already charged a bit. they probably have about 1200-1800mah in them already. to get the full capacity you need to run them down to 3v per cell then full charge it. 1 Quote Link to comment Share on other sites More sharing options...
Bajadre Posted July 17, 2020 Share Posted July 17, 2020 what brand are the lipos OP? my mate bought some ZOP 4s that were meant to be 5500mah once on the charger they only read as 4000mah etc 1 Quote Link to comment Share on other sites More sharing options...
Shudson Posted July 17, 2020 Share Posted July 17, 2020 You are starting from a false assumption that the charge shown by the charger is that available from the battery. It isn't; it is showing the amount of energy it has put in. After you have charged it, let it rest a bit and put it on charge again. The amount of charge will show a very low figure - more or less just the amount of energy to create a bit of heat. The battery should always have some residual charge when you put it on charge. If you get a reading of the full capacity, th4en there is a fair chance that the battery has had it. What the charger is showing is the same as a petrol pump. If you have an 80 litre tank that is half full and you then fill it up, the pump will show 40 litres, but you do actually have 80 litres available. 2 1 Quote Link to comment Share on other sites More sharing options...
Jumper Posted July 17, 2020 Share Posted July 17, 2020 3 hours ago, Shudson said: You are starting from a false assumption that the charge shown by the charger is that available from the battery. It isn't; it is showing the amount of energy it has put in. After you have charged it, let it rest a bit and put it on charge again. The amount of charge will show a very low figure - more or less just the amount of energy to create a bit of heat. The battery should always have some residual charge when you put it on charge. If you get a reading of the full capacity, th4en there is a fair chance that the battery has had it. What the charger is showing is the same as a petrol pump. If you have an 80 litre tank that is half full and you then fill it up, the pump will show 40 litres, but you do actually have 80 litres available. Exactly. This is a good explanation. Quote Link to comment Share on other sites More sharing options...
Gampla Posted July 17, 2020 Share Posted July 17, 2020 Exactly. This is a good explanation. Not only that I wouldn't put it past the batteries are shagged Sent from my G8341 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Acidsnow Posted July 17, 2020 Author Share Posted July 17, 2020 (edited) Cheers all, I think Shudson has it, noticed earlier irrespective of charge mode the capacity count always starts at zero. The 4s packs last around 20-30 minutes and the 2s ran for around 30 minutes but rather than being flat, the esc had thermally cut out, hooked it up to check and it was still showing 7.9v! Ah'd be annoyed if they were shagged Gampla, the 4s have had a total of three charges thru em and today was the first on a new 2s, happy enough all's good tho. Jumper, is 3v no runnin them a bit low risking damage? Edited July 17, 2020 by Acidsnow Another question! Quote Link to comment Share on other sites More sharing options...
Tug Posted July 17, 2020 Share Posted July 17, 2020 1 hour ago, Acidsnow said: Cheers all, I think Shudson has it, noticed earlier irrespective of charge mode the capacity count always starts at zero. The 4s packs last around 20-30 minutes and the 2s ran for around 30 minutes but rather than being flat, the esc had thermally cut out, hooked it up to check and it was still showing 7.9v! Ah'd be annoyed if they were shagged Gampla, the 4s have had a total of three charges thru em and today was the first on a new 2s, happy enough all's good tho. Jumper, is 3v no runnin them a bit low risking damage? 3.4 is about the limit, although the real damage doesn't occur until 2.7, then it's permanent damage. Never understood the mantra of setting the LVC to 3.7 (not suggesting that's what you've done), that's their nominal voltage, not their minimum safe Voltage. Each to their own. Quote Link to comment Share on other sites More sharing options...
Jumper Posted July 17, 2020 Share Posted July 17, 2020 (edited) 3 hours ago, Acidsnow said: Cheers all, I think Shudson has it, noticed earlier irrespective of charge mode the capacity count always starts at zero. The 4s packs last around 20-30 minutes and the 2s ran for around 30 minutes but rather than being flat, the esc had thermally cut out, hooked it up to check and it was still showing 7.9v! Ah'd be annoyed if they were shagged Gampla, the 4s have had a total of three charges thru em and today was the first on a new 2s, happy enough all's good tho. Jumper, is 3v no runnin them a bit low risking damage? it depends. if you are running a high amp draw the the voltage drop will be greater, so you want it to cut off sooner ie 3.4v. but if its a decent battery in a low amp draw car, ie a tamiya with a brushed motor or mild brushless system, then 3-3.2v is fine. It also depends on how good you esc is at shutting it off. on my xray its set to 3.2v, but it normally goes down to 3v per cell. on my hyper st its set to 3.4v but often cuts out at 3.5v or 3.6v, probably because its bigger heavier, with a larger motor, so it draws much more amps. Basically the higher you set the lvc, the safer it is for the battery, but you get less run time, because you are cutting it off sooner. Edited July 17, 2020 by Jumper 2 1 Quote Link to comment Share on other sites More sharing options...
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