  Studies of 6He beta decay along with tritium can play an important role in
testing ab-initio nuclear wave-function calculations and may allow for fixing
low-energy constants in effective field theories. Here, we present an improved
determination of the 6He half-life to a relative precision of 3x10^(-4). Our
value of 806.89 \pm 0.11(stat)^{+0.23}_{-0.19}(syst) ms resolves a major
discrepancy between previous measurements. Calculating the statistical rate
function we determined the ft-value to be 803.04 ^{+0.26}_{-0.23} s. The
extracted Gamow-Teller matrix element agrees within a few percent with
ab-initio calculations.
