2550 days equals roughly 85 months and at 0.175% we lose another 15% capacity on the battery putting it at 43% capacity. This article( ) on calendar aging of batteries says that the typical Li Ion battery will lose 0.2% capacity per month of storage at 25C or 77F, which is higher than my storage areas sit at so I will lower that loss by a small fraction to 0.175 loss per month. We also need to account for general loss of capacity due to aging of the battery. That doesn't seem right and since I know this is an older battery I am giving it a generous 800 cycles before hitting 80%, using a rough visual I traced an additional line to the graph provided from the /Battery_Capacity_Loss article and that puts my current capacity at roughly 58% 2186-364 = 1822 = rough estimate of number of charge cycles my headset has gone through.Īccording to the newer chart the battery would reach 80% at 1536 full discharges and that at my current charge count of 1822 I will be sitting roughly at 75% capacity. Since that is unlikely I will drop another full day of of each week to account for days I didn't have time to play. 2550-364 = 2186 = number of full charge cycles if I did this every day for the last 7 years. So to figure the rough number of total charges cycles I have used we will takeĢ550/7 = 364 = number of weeks we just need to subtract this from the total days, since we are only at 1 day of no charge cycle. This makes 6 full charge cycles per week of use. There are roughly 2550 days in 7 years and as an avid gamer I estimate that I used my headset to full depth of discharge 5/7 days of the week and 50% depth of discharge the other two day. I found this wonderful page for electric vehicles describing battery capacity degradation which showed number of charges and how far the battery discharged before charging, and correlated that information with the remaining charge in the battery, this site seems to use newer batteries as the average charge cycles to 80% are thrice the normal consensus of 500 cycles. This battery was claimed to have a run time of 10 hours, that was a fairly accurate estimate. I did a bit of digging and discovered that the headset runs off a single 600mAH Li Ion battery. Now though, the battery only last for a few hours before I have to plug it back in. I used to be able to charge the headset and wear it without wires for several days of play if I turned it off between sessions. If the latest Logitech software is giving issue, you can always revert to a known good driver version ( Logitech Gaming Software 8.45.) The only issue I have with mine, now that the headsets have been in use for 7 years, is the battery life. It works fantastic, once the popping from the virtual surround sound was fixed in one of the Logitech Driver updates.
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