My phone battery dies so quickly
→携帯の電池すぐなくなる。
「電池がなくなる」の「なくなる」には die もよく使われます。
phone battery で「携帯の電池」と言えると思います。
例）
As far as gadgets go, I carry round my phone and my iPod. My phone battery dies so quickly so I bring my iPod along with me so I can block out the sounds of screaming children, teachers etc.
〔May 2014 - Deliciously-Floral より〕
「携帯の電池切れ」の言い方はいろいろあるので、あくまで一例です。
ありがとうございました。
When I charge my phone, it doesn't last very long.
My phone battery has a short life.
The charge on my phone runs out quickly.
How annoying is it when your mobile phone battery runs out quickly? You wait a long time for it to charge, only for the battery to be dead a few hours later!
When we talk about the battery on our phone, we can say "phone battery", "battery", or even just "charge".
We are all familiar with the effects of poor battery life and the batter may be well-described by the adjective 'duff'.
"I need a replacement battery as this one's duff!"
バッテリーの寿命がくるのは全ての人に起こることで、形容詞 'duff'（壊れた、役に立たない）を使って表現するのがぴったりでしょう。
"I need a replacement battery as this one's duff!"
このバッテリーが壊れたから新しいのに変える必要がある。
1. When the phone battery life runs out quickly, you can explain that it "drains" quickly. If something is draining, this usually means it's not holding the electrical charge very well, and therefore it goes down or drains away.
2. If your phone dies really fast, this usually means that the battery runs out of charge quickly. Therefore, if you explain simply that your phone dies, it is widely understood that it has a battery problem without specifically saying the battery dies/drains.
1. 携帯の充電が早くなくなることを、 "drains" quickly（すぐになくなる）ということができます。drainとは、充電の持ちが悪く、すぐに減る、なくなるという意味です。
2. your phone dies really fastとは、充電がすぐになくなるという意味です。ですので、your phone diesとは、充電がなくなると具体的に言わなくても、充電に問題があることを理解してもらうことができます
My phone battery dies faster than I can charge it!
People say phone battery or phone charge. Both can be used interchangeably. It usually happens when your phone is getting old and needs to be replaced or taken to the store for maintenance. Adding "horrible" to the sentence shows your frustration with your phone and it is a pain everyone will understand.
Hope this helps!
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