I try to avoid in the first place getting myself into such a highly diminished electrolyte state. BY FAR, I choose to replenish electrolytes through eating food. NO, one does not always need a fancy electrolyte powder or drink to replenish electrolytes. Since my trail food resupplies always consists of food with various nuts, seeds(chia and hemp are two good ones ), nut butters, a few fresh fruits/vegetables, dark leafy greens, fresh sprouts(grow on trail as I hike), and at least one dinner containing beans, which ALL, with some consideration to electrolytes, are high in electrolytes, and in THEIR WHOLE FOOD FORM, NOT IN ISOLATED COMPOUNDS REMOVED FROM THEIR WHOLE FOOD MATRX, it factors strongly in having less need for a separate electrolyte mix. I have carried a small Himalayan Sea Sat rock I shaved off a bit into snack foods, dinners, and even water I drink/consume as I hike. Nothing wrong with bananas either which I consume during hot weather at every town stop where I can find them! Probably not what you were expecting, maybe not the most sexy, maybe not high sounding or as complex as many make electrolytes to be, BUT GETS THE JOB DONE.
However, when I feel the need to supplement with an electrolyte mix I use Emergen -C- Electro Mix, Nunn Active Hydration tablets, Vega Sport Electrolyte Hydrator( I really like this one), GU Brew, and Hammer(various mixes).
I like Coco Hydro electrolyte drink or Navitas Naturals Coconut Water mixed with any of these or by itself into H20. This is my favorite electrolyte additive which I like to combine with the Vega or Emergen-C and a tsp of Chia seed. I sip it for hrs.
http://bigtreefarms.com/products/coco-hydro
http://navitasnaturals.com/product/5...er-Powder.html