Battery Drain - Honor 7 Q&A, Help & Troubleshooting

Hi ive been using my honor 7 for about 16 months on C185B382
the phone is performing normally except the abnormal battery drain ive been experiencing since the last week or so. I have my data on all the time except when im at home and wifi is connected, apart from that there is moderate use of apps like FB, Twitter, SC and Whatsapp etc, not a heavy gamer either. The batter drops from 100% to around 25-30% in around 7-8 hours. Is that normal?

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Before every update this is recomended:
Backup all data, photos, media, contacts, sms...etc.
Update to new version of firmware.
After update do factory reset.
Revert back backuped data.
Sent from my Honor 7

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I'm seeing the same deterioration. I'm actually starting to believe the Honor 7 batteries are just not great quality and don't hold many charges.

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I'm getting the same, phone only gets light use and it's now only lasting a day rather than 3

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check under 'advanced settings' -> 'battery manager' -> 'consumption levels' if there's any app draining your battery.
if you see any abnormal usage, uninstall that particular app and reinstall it.
sometimes, especially with Google apps (play services and such), the only viable option is a reset: backup/reset/restore and you're good to go
I had this problem after updating to b390 a few weeks ago, reinstalling the malfunctioning app fixed it
on a lg v20 I had to go through all the reset process instead, but well worth it

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Drain issue solved
Dear forum members,
Today i solved the battery drain issue for my wife's Honor7. Effect was as described earlier: below 50% battery random shutdown appeared, but some high energy needed apps also shut down the phone, like whatts or FB messenger video calls.
For changing at your home you need the following:
0. Optional : voltage/current/charging capacity meter for the charger USB outlet.
1. Spare battery and plastic tools with a simple screwdriver.
2. Hot air blow gun or a hairdryer.
3. Medium level technical skils.
4. One hour time worst case.
Before the swap of battery i measured the charging capacity: both times i measured 1200-1400 mAh. Means the battery about to die, after 2 and a half year. This is normal, but the death time can be shorter if you use high drain apps or games.
The hardest thing at the swap is the back cover removal and the removal of battery from the factory double side tape. These will need high patience.
For step-by step tutorial please check this video:
tps://youtu.be/dKmBEqIJRTI
Battery and toolset here:
US $9.52 16%OFF | Hua Wei Replacement Phone Battery HB494590EBC For Huawei Honor 7 Glory PLK-TL01H ATH-AL00 PLK-AL10 3000mAh
tps://s.click.aliexpress.com/e/UhSXi8Z
During the change i observed that the old battery was more thick, than the new one.
After swapping the battery showed 50%. I discharged to 35% by facebook messenger video calls. The phone did not shut down. During initial charge the meter shows 20% and about 600mAh already pumped in. So the battery will be about 3000mAh.
I hope my English was good enough to give some hints for you all!
---------- Post added at 02:33 PM ---------- Previous post was at 02:17 PM ----------
Sorry i'm not yet allowed for sharing links... Please add ht at the beginning of links.

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Battery drain is not solved even after replacing with a new battery
chicho911 said:
Dear forum members,
Today i solved the battery drain issue for my wife's Honor7. Effect was as described earlier: below 50% battery random shutdown appeared, but some high energy needed apps also shut down the phone, like whatts or FB messenger video calls.
For changing at your home you need the following:
0. Optional : voltage/current/charging capacity meter for the charger USB outlet.
1. Spare battery and plastic tools with a simple screwdriver.
2. Hot air blow gun or a hairdryer.
3. Medium level technical skils.
4. One hour time worst case.
Before the swap of battery i measured the charging capacity: both times i measured 1200-1400 mAh. Means the battery about to die, after 2 and a half year. This is normal, but the death time can be shorter if you use high drain apps or games.
The hardest thing at the swap is the back cover removal and the removal of battery from the factory double side tape. These will need high patience.
For step-by step tutorial please check this video:
tps://youtu.be/dKmBEqIJRTI
Battery and toolset here:
US $9.52 16%OFF | Hua Wei Replacement Phone Battery HB494590EBC For Huawei Honor 7 Glory PLK-TL01H ATH-AL00 PLK-AL10 3000mAh
tps://s.click.aliexpress.com/e/UhSXi8Z
During the change i observed that the old battery was more thick, than the new one.
After swapping the battery showed 50%. I discharged to 35% by facebook messenger video calls. The phone did not shut down. During initial charge the meter shows 20% and about 600mAh already pumped in. So the battery will be about 3000mAh.
I hope my English was good enough to give some hints for you all!
---------- Post added at 02:33 PM ---------- Previous post was at 02:17 PM ----------
Sorry i'm not yet allowed for sharing links... Please add ht at the beginning of links.
Click to expand...
Click to collapse
I've replaced the battery with an original Huawei Honor 7 replacement battery. The new battery was fully charged at 1.30 pm today. However, by 5:30 pm, the battery had drained to below 45%.
Upon studying the Consumption level, I found out that they are many processes running in the background as follow:
1) Android OS => 14.89%
2) Media (multi apps) => 6.75%
3) WhatsApp => 5.68%
4) Android System (multi apps) => 4.83%
5) Google => 3.84%
6) Telegram => 3.23%
7) Media Server => 2.45%
8) Google Services (multiple apps) => 2.43%
9) Chrome => 1.36%
10) SystemUI (multiple apps) => 1.24%
11) Facebook => 1.14%
12) Google Play Store => 0.69%
13) Google Text-to-speech Engine => 0.59%
14) Retro Clock => 0.45%
15) Maps => 0.34%
16) True Phone => 0.18%
17) Huawei Home => 0.18%
18) Huawei Mobile Services => 0.16%
19) Gboard => 0.12%
20) Lelong.my => 0.11%
21) YouTube => 0.08%
22) Messaging => 0.05%
23) Phone (multiple apps) => 0.04%
24) Cell Broadcasts => 0.03%
25) Quick Lock => 0.03%
26) Weather => 0.02%
27) Motions => 0.02%
28) Clock => 0.02%
29) Android Core Apps (multiple apps) => 0.01%
30) Smart Unlock => 0.01%
My conclusion, the background processes actually drain the battery very fast. I'm not sure if the problem could be solved by following what buongu suggested.