We have shown results for an instrument-free LAMP assay with a simple qualitative visual readout. As operated here, LAMP is an exponential rate assay being assessed with an endpoint measurement. Thus, the timing of reaction interrogation and/or a reliable ''stop'' reaction are required for quantitative precision. If quantitative results are required, improvements to the entire assay system to facilitate precise timing will be necessary. This could include, for example, a different heater-lid or incubation-vessels to facilitate access, or a ''reading window'' in the heater to enable visual interrogation while the vessel is still in the heater. An elevated temperature ''stop'' (.80uC) is generally used for LAMP. In our experimental work here, we used an electrical heat block for this purpose; however, this could be accomplished with the electricity-free heater by the inclusion of a parallel heating unit at a higher temperature (essentially, by including a second incubation chamber that uses a different EPCM, or no EPCM at all). Alternatively, a chemical ''stop'' could be developed, or a boiling water bath could be kept at hand. Other assays perform best with a pre-amplification, high-temperature denaturation step (''hot start''). A second incubator chamber could facilitate this feature even more readily.