Serious anglers, this GP20A battery is exactly what you need to keep your electric reels powered up all day long! With a massive 20,000mAh capacity at 14.8V (that's 296Wh), this lithium-ion battery can handle 1-2 full days of fishing without needing a recharge. It's compatible with pretty much all Daiwa and Shimano electric reels including Tanacom models, Seaborg series, BeastMaster, ForceMaster, and many more. The LCD display shows you real-time power, voltage, and temperature so you always know exactly how much juice you have left. The 70mm widened electrode is genius - it can accommodate multiple sets of clamps and power several reels simultaneously. Plus, there are two USB ports to charge your other devices like phones or fish finders. The ABS plastic body with rubber protective cover feels durable and safe, and it weighs about 1750 grams with convenient handles and a shoulder strap for easy carrying. It comes with all the protection circuits you'd want - charge protection, discharge protection, power protection, short circuit protection, and temperature protection. The package includes the battery itself, a charger, shoulder strap, 1.5-meter reel cable, and instruction manual with warranty information. Just a quick note - it's NOT compatible with Shimano 6-pin power plug reels, Banax Kaigen, or Miya Epoch reels, so double-check your specific model before ordering. Whether you're fishing offshore, deep dropping, or just want the convenience of electric reels without worrying about battery life, this GP20A delivers reliable power that serious fishermen can count on trip after trip.