What is Reddit's opinion of Tenergy Fire Retardant Lipo Zipper Bag, with Detachable Shoulder Strap, Battery Bag for Charging and Storage, 8.5 x 6.5 x 5.7inches?

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If you have the time, you can do #3 then #1... or just do #1 altogether. I'm not familiar with the shops across the pond but we have big stores like Best Buy and Home Depot that have battery recycle bins right at the entrance. If you do #2, you can get something like one of these that I had at a previous job that stored hundreds of cellphone batteries.