I'd recommend a charger with more output than 80W. The batteries OP has in cart is 11.1v @ 3000 mAh. Assuming you're charging at 1c (3A per battery), that is 33.3W required per battery (V * A = W), you can only charge 2.4 batteries at that full 1c charge rate, leaving no room for charging at 2C or charging 3 or more batteries at the full amperage (charging 3 of those batteries would be divvying up 80W over 3 batteries. 80W/3=26.67W per battery or ~0.8C charge rate per battery, pushing charge times well above an hour for 3 batteries). I'd recommend something with at least 200W output power allowing you to charge up to 6 of these batteries at 1C (200W / 6 batteries = 33.3W per battery -- i.e. 1C charge rate for 6 batteries simultaneously; note this number will change if the battery mAh or voltage changes). I have a HOBBYMATE SPEED H6 that has served me well. Granted it costs more money per W than the chargers you and OP linked, but to get the equivalent charging power from those chargers, I would have to buy 3 of them, taking up 3 wall outlets, and I would need to buy the necessary accessories (i.e. multiple balance boards) for each of the chargers, making the 200W output a better deal overall, assuming that you are not charging different battery types (for example if you have 4s batteries, 3s batteries, and 2s batteries, it might make more sense to buy 3 individual chargers because you can charge each battery type simultaneously whereas the H6 can only charge one battery type at a time because it's only got one channel).