DP2 LOAD TESTING A BATTERY E30 AND D40 SERIES [BATTERY LOAD TESTING SWL 12 2 14]
Learn how to perform load testing on E30 and D40 series batteries with SWL 12-14 using DP2 equipment for improved battery performance and longevity.
Written by Nash Bernardo
Updated at February 20th, 2025
LOAD TESTING
A BATTERY
E30 AND D40
SERIES
LOAD TESTING
A BATTERY
-
You will need a Digital
Volt Ohm Meter
LOAD Testing
A Battery
-
2 Jumper Wires
with Alligator Clip
on each end
1.Turn the Key Switch off, remove
cover (s) as needed, this will
provide access to the batteries
2. Once the Cover (s) have been
removed pull back the rubber post
covers from the Main Positive &
Negative Battery Post
3. Connect the jumper wire to the
Positive and Negative on the
Multimeter lead ends
4. Connect the other end of the
jumper wire to Main Battery
Positive & Negative
terminal ends by sliding it under the
eyelet next to the battery post
5. Get a Near capacity load to lift load
test the batteries
6. Set the meter to the 200 Volt D/C
6. Note your Static Battery Voltage 
A general rule of thumb a Maximum
of 10% voltage drop under load
6. Note (write your Static Battery Voltage down)
The rule of thumb is a Maximum
Voltage drop of 10% under load
(example 25.0 x0.10 = 2.5)
7. Lift the load and note the meter
reading at it smallest number
6. Note (write your Static Battery Voltage down)
The rule of thumb is a Maximum
Voltage drop of 10% under load
(example 25.0 x0.10 = 2.5)
7. Lift the load and note the meter
reading at it smallest number
8. Subtract your Load test voltage from the
Static voltage (25.0-24.4=.6) ,
This will give you your voltage drop (.6)
This example would indicate the batteries
are OK
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