Standard tests for the Spyder battery are:
1. Should charge at 13.0-14.0 volts at 4,000 rpm.
Check
2. The battery should retain a minimum of 12.6 volts several hours after fully charging, and removing the charger. I suggest testing the following morning, after removing the charger the night before.
12.58Vdc this morning
3. When cranking (with the throttle held wide open to prevent starting) the voltage should remain above 10.0 volts.
This was very hard to do with my voltmeter needle probes and only 2 hands, but I managed it. The reading didn't budge much at all.
If the first test fails, the charging system has problems. The second test indicates a weak battery. The last test is a load test and also indicates a weaken battery that has lost starting capacity. Sulfated batteries, which can happen by using the wrong charger, or letting an uncharged battery sit for an extended period, often fail the second test. If the battery is marginal now, but starts your Spyder fine, I'd wait a while before insisting on a battery replacement under warranty. You have six months. The more it has failed, the more likely the dealer is to replace it no questions asked. Please also note that loose or dirty connections can cause the battery to charge improperly, and to fail some of these tests. Always check the connections (at the battery itself) first.