Heavy batteries (around 7kg?) are a burden on luggage, lithium batteries are consumables yet expensive, and small ones cause battery anxiety... This battery (5000mAh) has enough capacity for fishing trips without any issues, and its size and weight are not a burden on luggage (1.83kg). I've been using it for 3 years now, and it works perfectly until the end for 6-hour boat fishing trips (like for hairtail) with an 80-go sinker at a depth of about 80m, with frequent raising and lowering. I also use it to power my fish finder and to inflate my boat. The charger has low output, but if you charge it the day before your trip, it's fine, and it puts less stress on the battery than fast charging. The secret to making any battery last longer is to be careful about high temperatures and over-discharge. 1: Do not expose to direct sunlight for extended periods. 2: After fishing, rinse off salt and then charge. (Salt can cause a weak current to flow between the positive and negative terminals, leading to over-discharge, or corrode the terminals, making it difficult for current to flow.) #ElectricReel #Battery #Fishing