Chargers: 2a lithium SLA charger6aH - Small Kayak Fishfinders and Ice Fishing FlasherThe Amp Outdoors 5Ah battery is the best budget upgrade for a traditional 7-9Ah SLA (Sealed Lead Acid) batteries. The 6Ah battery weighs less than 2lbs and will still hold 80% capacity at 2000 charges. This battery will give you more usable power than a 9AH SLA and will power most low power fishing flashers for 20hrs. 12aH - Kayak Electronics, Power Boxes, Fishinders, and Ice Fishing Flashers The Amped Outdoors 12Ah battery is the highest capacity battery made to fit in the most commonly used fish finders and fishing flashers on the market today. This will replace your traditional 7-9Ah SLA (Sealed Lead Acid) batteries. 20% more capacity than the competition for the same weight and size! 18aH - Power boxes, Larger Fishing Electronics (Garmin Livescope), Kayak Power, Small solar and outdoor offgrid applications, Medical DevicesThe Amped Outdoors 18Ah battery was especially designed to add more capacity to large ice fishing electronics! This battery holds 20% more capacity than the same size 12Ah batteries by other companies in the industry. 30aH - Small Boat Electronics and Trolling Motors The Amped Outdoors 33Ah battery was especially designed to add more capacity to large ice fishing electronics outdoor power needs! This battery holds the most capacity in a battery of its size and weight! WHY AMPED OUTDOORS LITHIUM BATTERIES?*Twice the battery life at a fraction of the weight!*2000+ Cycles vs 400+*Nothing fancy, built to work! *4 sizes of batteries to fit your needs*FREE shipping (US-lower 48) Lithium (LiFePO4) Batteries Q - How does Amped Outdoors Batteries compare to other brands?A - You will find Energized Outdoors stands behind the quality of their products. These have been field tested and have completed side-by-side comparisons against the big names in this industry and are happy to say Amped Outdoors matches their performance. Amped Outdoor batteries are purchased direct, do not waste money on fancy casesdecals, and we minimize our markup to offer you an affordable solution. The way it should be!Q - Do Amped Outdoors batteries have a built-in BMS (Battery Management System) with cell balancing?A - Yes, each battery has a built-in BMS with cell balancing. Each batterys BMS specs will vary based on the type of battery. The BMS protects the battery from overcharging, discharging, current draw and cell balancing. To ensure you purchase the right battery for your intended use, please contact us before making your purchase with any questions. We are more than happy to direct you to the right product to meet your needs.Q - Can you run LiFePO4 Batteries in Parallel?A - Yes! Q - Can you run LiFePO4 Batteries in Series!A - This battery is not intended to be wired in Series. The BMS (Battery Management System) is a 12v system which if connected in series could reduce the life of the battery or cause damage to the battery. If you intend to connect this battery in series to achieve a higher voltage, please contact us immediately for our product lineup that will meet these needs.Q - How does this battery perform in the cold? A - It is encourage to store the battery in above freezing temperatures. We have tested this battery in below 0 temperatures and have experienced less than 15% capacity loss.Q - Can I use my SLA Charger?A - It is encouraged not to and to use the proper charger for this battery. Most SLA chargers are capable of charging this battery but not to full capacity. Defective non LiFePO4 chargers may cause damage to your battery and void manufacturer warranty. *Charger sold separatelyQ - Can I use my LiFePO4 Lithium Charger on other BatteriesA - No, you risk damage, overcharging and fire to other batteries.