Does anyone use their phone so much the battery has died? (電池切れだ)
Have you ever tried an external battery? I bought one last year but it’s too heavy. It’s not really practical. (それは実践的ではありません)
I asked a few people and they said RAV Power 10000mAh Power Bank is pretty good.
It’s small, light weight and has good recharging power. It sells for 3,999 yen on Amazon so it’s not so expensive.