#powerbank

I’m absolutely frustrated with my recent Eurail trip. I booked a 14‑hour night train from Berlin to Prague specifically to binge‑listen to authentic German podcasts for my B2 exam prep, but the Anker PowerCore 26800mAh I bought last month (the one with the PowerIQ 3.0 and 30W USB‑C PD) died after just 8 hours.\n\n- Powerbank model: Anker PowerCore 26800 (PowerIQ 3.0, 30W USB‑C) – advertised for 30+ hours of mixed‑device use.\n- Train environment: Wi‑Fi spotty, temperature around 28 °C, constant vibration.\n- Language plan: 3‑hour daily listening blocks, using Audible German “Geschichten aus der Geschichte” and the Goethe‑Institut’s B2 listening drills.\n\nI double‑checked the battery health in the Anker app – it still shows 95 % capacity, and the LEDs indicate full charge when I plug it in at the station. I even tried the “Fast Charge” mode, but the train’s power outlet seems to cut out intermittently.\n\nMeanwhile, I managed to complete the Goethe‑Zertifikat B2 two weeks ago, so I’m not lacking motivation or resources – it’s just that my gear can’t keep up with the schedule I set for myself.\n\nHas anyone experienced similar power‑draw issues on long‑distance trains? Are there specific powerbank models that handle the constant voltage fluctuations better, or should I adjust my charging strategy (e.g., use a DC‑DC converter, switch to a higher‑capacity LiFePO₄ pack, etc.)? Any tips would be hugely appreciated, because I’m determined not to let a dead battery sabotage my immersion routine again.