The charge algorithm of the SLA differs from the NiCd and NiMH in that voltage-limit rather than current-limit is used. The charge time of the SLA is a slow 16 hours. With higher charge currents and multistage charge methods, the charge time can be reduced to 10 hours and less. In no way can the SLA be charged as quickly as the NiCd. A multistage charger applies three charge stages consisting of constant-current charge, topping charge and float charge (see figure below).
Best Answer: Zanaflex will stay in your body at a maximum of 24 hours. I would say that after 3 days of not taking Zanaflex, if your blood was drawn, no trace of Zanaflex would be found. If you look at the package insert [information that the FDA approves and has to be with every medication], on the first page, second column there is a graph. It shows that after 1 dose, at 24 hours, there should be little or no Zanaflex in the bloodstream. Zanaflex also has a pretty short half life (~2 hours) so the graph matches.
Do not take more than three doses (36 mg) of Zanaflex in a 24-hour period. Too much of this medication can damage your liver. Cold or allergy medicine, narcotic pain medicine, sleeping pills, other muscle relaxers, and medicine for seizures, depression or anxiety can add to sleepiness caused by Zanaflex.