[Nut-upsuser] UPS shows 120%

[nut-upsuser at muttmutt.com]

I just got NUT 2.0.1 running on my Debian system at home.  I have a
new CPS UPS connected via USB.  Everything is working fine, except
the UPS is showing a value of 120% charged.  Any idea what causes
this?  Here's the upsc output for my UPS:

battery.charge:
120
battery.charge.low: 10
battery.charge.warning: 20
battery.runtime: 1320
battery.runtime.low: 300
battery.type:
PbAcid
battery.voltage: 20.2
battery.voltage.nominal: 12.0
driver.name: newhidups
driver.parameter.port: auto
driver.version: 2.0.4
driver.version.data: APC/CyberPower HID
0.9
driver.version.internal: 0.28
input.transfer.high: 140
input.transfer.low: 90
input.voltage: 121.0
input.voltage.nominal: 120
output.voltage: 122.0
ups.beeper.status: enabled
ups.delay.shutdown: -1
ups.load:
24.0
ups.mfr: CPS
ups.model: UPS BF700
ups.status: OL