Sorry to hear about this, @sara31171. The battery certainly should not be draining this quickly. Each time you are charging the battery, it is best to ensure the battery is charging to 100% for maximum time between necessary charging.
There are factors that can drain your battery quicker than normal. Too many events, frequent long live views, cold temperature, and wifi signal interference can all cause the battery to drain quicker. It sounds like you are taking steps to improve wifi connection, and our Community post about RSSI might help further. Additionally, here is our Community post about battery drain for more tips on optimizing battery charge life. I hope this helps! 