Introduction Previously, the authors collected data from 20 patients with rechargeable implantable pulse generators (R-IPGs) and found that larger battery capacities, efficient discharge settings, and lower pulse widths were associated with longer times between recharges and less time spent recharging.¹ In this poster, we use the earlier data to calculate the effect of active discharge settings and voltage multipliers on the patients' maximum time between recharges. (Active discharge is how R-IPGs use a reverse pulse after a stimulation pulse to dissipate excess energy in their circuits [Fig. 1]. Voltage multipliers are the rate at which R-IPGs amplify their voltage to increase power.) Methods Patients in the previous study used R-IPGs with differing voltage multipliers and active discharge settings. One R-IPG (340 mAhr battery capacity) used active discharge only at frequencies above 250 Hz and varied the strength of its reverse pulses depending on pulse frequency. This device also used voltage multipliers that amplified the voltage by half steps. The other R-IPG (200 mAhr capacity) used active discharge at frequencies above 130 Hz. This R-IPG employed reverse pulses that were equal to the original stimulation pulse and had voltage multipliers that amplified the voltage by whole steps. Data from the 4 patients who used stimulation frequencies above 130 Hz was combined with established impedance values² to extrapolate the effect of each active discharge and voltage multiplier option on between-recharge times (Figs. 2–4). Results The use of active discharge above 250 Hz with variable reverse pulses or the use of half-step voltage multipliers increased the time between recharges more than the alternatives (Table 1). The effect was greater when these two options were combined. Conclusion The use of variable reverse pulses, active discharge at higher frequencies, and half-step voltage multipliers appear to increase the time between recharges for R-IPGs.