The performance advantage of Li-Ion batteries versus NiCd and NiMH technology has created a worldwide demand for Li-Ion cells that is much greater than current manufacturing capacity. This is keeping prices high and supplies scarce - a situation expected to continue for at least several more years. Multichemistry chargers, while challenging to design, keep price-performance points flexible and guard against interruptions in supply. This paper surveys the design issues in implementing chargers that handle NiCd, NiMH, or Li-Ion cells interchangeably.