if you look at the other thread i started for the wired cases, a few people have shared the same anecdote that the Gen2 case appears to discharge much faster than Gen1 case.
it would be fantastic to hear what you find in comparing your old case to your new one. if you find that your new Airpods discharge the old case as fast as they do in the new case, that would be a very illuminating data point. what i don't understand is "which device" holds onto the firmware: the AirPods themselves, the charging case, or both.
i only have Gen2 experience, but i think i have a ton of evidence in my 3 weeks of ownership of three separate sets of Airpods with wired case (both swap outs encouraged by the Sr Advisor who had my two first sets "captured" for engineering to look at), and i have observed the following:
- Recharging Airpods discharged a significant level (60% or more) consumes the case a rate very much in line with the promised 19 hours specified by Apple.
- Shorter discharge cycles (less than 25%) of the Airpods results in a relatively larger use of charging case capacity (see some of the numbers i posted in the other thread)
- there a random drops in case capacity when the Airpods are at 100% and the case has been closed and sitting idle. i have observed as much as 3-4% in one hour, and as little as 0% after 11-12 hours. there doesn't appear to be any consistent behavior/explanation for this (but i continue to take data and experiment with things (see speculation below).
Some speculation/theories:
- it is my suspicion that recharging a slightly depleted set of Airpods is "less efficient" due to the trickle charge that likely occurs in the last 5-10% of the charging.
- i speculate that there is some bug/problem with the charging case not going to sleep in some cases even after it has completed charging the AirPods. my latest pursuit of this has only 2 data points to support a solution/cause of the problem. after reading some prior posts for the 1st gen charging case having similar problems, the past two nights, i have let my AirPods charge to 100% after my evening commute, after which, i have disabled my phone's BT until the morning (just using the control panel on my iPhone XS). when i have done this, i have experienced 0% drop in battery over the intervening 11-12 hours until i reopen the case to use my Airpods the next morning. in contrast, three nights ago, i experienced a 5% drop overnight which surprised me. i should note, however, that this was the first night i owned my 3rd set of Airpods (gen2), during which i witnessed that the firmware had been updated from 661 to 671. so this might be the explanation for the draining of the battery. i think tonight, i will try again to leave my phone bluetooth on and see what happens.
- as noted above, if i run the system as specified by apple, all three gen2 AirPods would likely yield the 19+ hours specified by apple (ie, run the Airpods down to zero and have them recharged by the case) given the efficiency of recharging severely depleted Airpods. therefore, i'm guessing that if apple doesn't figure this out, they would say that the AirPods are performing as specified (i am very curious to learn of Scottio's experiment with his gen1 case).
i should conclude by noting that the AirPods themselves are performing up to spec themselves. i project get more than 5 hours for my listening habits. my first two sets were projecting close to 6 hours of life with volumes ranging in the 30-40% range. my latest set is closer to 5:30-5:40, but very satisfactory.
in reality, the AirPods more than adequately suit my purposes because i will rarely use them for more that 2 hours at a time, and my typical usage will be 40-60 minutes at a time during my commute. unfortunately, that means my charging case will perform inefficiently and not provide close to the 19 hours of specified recharging capacity. this is disappointing because i was hoping to recharge the case every 2 weeks or so. i'm guessing i will need to recharge it at least weekly. not a huge problem, but a small inconvenience.