MillerTech 12300-BTH
The MillerTech 12300-BTH is a battery pack with a nominal voltage of 12.8V, 3840Wh of energy and a peak of 400 A.
Last updated: 15 October 2026
Battery and charging
- Energy
- 3840Wh
- Voltage
- 12.8V
- How the pack is built
- Dual stainless steel air vents, pure brass terminals, custom waterproof case, integrated carry handle
- Maximum continuous discharge
- Max Continuous Charge/Discharge Current: 150A
- Peak discharge
- 400A
- Highest charge current it will take
- Max Continuous Charge/Discharge Current: 150A
- Charging voltage
- 14.6
“Voltage: 12.8V Capacity: 300Ah Energy: 3840Wh”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Voltage: 12.8V Capacity: 300Ah Energy: 3840Wh”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Construction: Dual stainless steel air vents, pure brass terminals, custom waterproof case, integrated carry handle”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Max Continuous Charge/Discharge Current: 150A”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Max Charge Voltage: 14.6 Max Continuous Charge/Discharge Current: 150A Peak Discharge: 5S 400A”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Max Continuous Charge/Discharge Current: 150A”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Max Charge Voltage: 14.6 Max Continuous Charge/Discharge Current: 150A”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Battery care and safety
- Operating temperature range
- Operating Temperature: -4°F – 140°F
- Low-temperature charge protection
- Yes
“Operating Temperature: -4°F – 140°F”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Low Temp Charging Protection: Yes”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Size and fit
- Overall dimensions
- 13.5” x 9.6” x 10.5″
- Terminals
- pure brass terminals
“Capacity 300AH Voltage 12V Weight 62.3 lbs Size 13.5” x 9.6” x 10.5″”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
“Construction: Dual stainless steel air vents, pure brass terminals, custom waterproof case, integrated carry handle”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Fitment across the range
- Connectivity
- Bluetooth
“Memory Effect: None BMS: Yes Bluetooth: Yes”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Other findings
- Bluetooth
- Bluetooth
“Memory Effect: None BMS: Yes Bluetooth: Yes”
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Sources
- 12V 300Ah Lithium Battery – Sports Series (Bluetooth WHeater) (Model#12300-BTH) - MillertechArchived document
Source: millertechenergy.com/product/12v-300ah-lithium-battery-sports-series-bluetooth-wheater-model12300-bt
Retrieved October 11, 2026