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HotShock B4 Battery Energizer

While Supplies Last. All sales are final, no returns.

This is the B4 energizer only. Batteries and solar panels sold separately. To order, see accessories tab below.

40% more output than the IntelliShock 20B. That's important because it allows more rolls of netting to be powered from the same unit. Has few equals for ease of use for temporary livestock fences and electrified netting for sheep, goats and furry "critters."

Use a 12v sealed lead acid battery or an EzePower 9v dry battery. Both fit inside the case. (12v leads are extra.) Peak output of 0.35 joules (with 12 volt battery). Can be used with a solar panel kit.

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117350 HotShock B4 Battery Energizer While supplies last! 0.00 $230.00

Properly storing energizers and batteries for winter

Click Below to View Instructions/Diagrams

HotShock B4 Instructions [2 MB]
Installation & Warranty [313 KB]

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Common Uses

A battery fence energizer that is used for temporary or short lengths of fence to keep in cattle, horses, sheep, goats and poultry.

Protects livestock from coyotes, fox and raccoons. Keeps bear from destroying bee hives.

Used around gardens and orchards to keep out rabbits, deer and other wildlife.



  • .4 stored joules
  • .35 released joules
  • .26 joules output in moist soils
  • .27 joules in dry soils


  • Draws 43 mA per hour on a weedy or clean fence.
  • A 12v 100 ampere hour battery will last approximately 60* days. *Assumes being drawn down to 40% between recharges.
  • 60 pulses per minute.
  • Sits on its own support stake. Less obvious and less prone to theft.
  • Support stake (13" long) doubles as a ground rod.
  • Box is 8"L x 5-1/4"W x 6.5"H
  • Dry cell battery life will double by adding a solar panel to it.
  • Includes wiring harness for connecting to the fence and ground stake.
  • Note: 12v, 12 amp hr and EzePower batteries are the only batteries that will fit inside the B4 case. All others will work, but have to be used externally.

Should Power...

  • 3500' of multi-strand fence
  • 5 164' sheep/goat nets
  • 3 of the 164' poultry nets.
  • Note: All distances are dependent on amount of grass/weed load on the fence.

Can be used as a solar energizer

  • See options under accessories tab above.

NOTE: Batteries and solar panels sold separately. To order, see accessories tab above.


The HotShock B4 is "wide-impedance" -which means it will remain effective even when the soil becomes dry & the grass turns brown. Portable, lightweight and easy to move. User friendly cases. Versatile--can be used with a 9v dry cell battery or a 12v deep cycle battery, with or without a solar panel.


  1. Connect red lead's bare wire end to fence terminal and clip other end of lead to fence
  2. Connect black lead's bare wire end to ground terminal and clip other end of lead to ground rod.
  3. Push black on/off button to turn on.
  4. Test fence.


  • Make sure the energizer is turned off before working on the fence or the energizer.
  • Use on size appropriate fences.
  • Note: 12v, 12 amp hr and EzePower batteries are the only batteries that will fit inside the B4 case. All others will work, but have to be used externally.


To determine if the fault is with the fence or the energizer...

  1. Test the energizer first
  2. Turn off energizer.
  3. Disconnect ground wire and the fence wire.
  4. Turn energizer back on.
  5. With fence tester, put the ground probe (or clamp) to the ground terminal on the energizer and the metal loop (or positive clamp) at the top of the tester to the fence/positive terminal. The reading you get tells you how well the energizer is working without any other variables. If there is a very low voltage (under 4000v) or no voltage, then the energizer may have a problem. If the voltage is high (greater than 4000v) then the trouble lies with your fence. Most energizers put out between 5000v and 8000v when there is no load (i.e. no fence hooked up).

If the energizer is faulty and it's a battery unit you need to learn if the battery or the energizer is the problem...

  1. If it's a 12 volt energizer carry the unit to a nearby vehicle and attach the input cords carefully to the vehicle's battery.
  2. If the energizer now works, then your fencer's battery needs to be recharged or replaced.
  3. If the energizer does not work, then you should call Premier re. repairs.

If the fence is at fault, then you must find the fault(s) and fix them. Here's how to start this process:
If you have a Fault Finder you can simply touch the fence with the Fault Finder at various points along the electric fence(s). The Fault Finder will tell you at each point which direction to go in to locate the problem. Move in that direction testing as you go and you will arrive at the problem. Note: The directional arrow of the Fault Finder is not accurate with net.

If you lack a Fault Finder…

  1. Walk or drive along the fence looking for any point in which the energized wires touch the soil, a steel post or a steel wire. On HT wire fences, check the wires at braces to see if they are touching a hot wire. On netting, look for a hot wire touching the metal stake at the bottom of the plastic posts. Also look for damaged insulators.
  2. If the fence can be separated into several parts (by switches or by disconnecting parts of it), you can locate the problem by beginning at the far end and then progressively turn off or disconnect the sections of fence. When the voltage on the remaining fence rises sharply, you've located the section(s) that's causing the problems.
  3. The alternative to (2.) is to begin at the fencer and progressively turn on sections of the fence. When the voltage suddenly drops you can assume that the problem is in the section most recently connected.


Our unique 2-Year Warranty If an energizer fails within 2 years from the purchase, Premier will replace the module/unit at our cost (unless the reason for its failure is customer abuse or neglect). Your credit card will be charged for the replacement but you will receive full credit when the failed item is back at Premier. Your only cost is shipping the failed item to us. If the original energizer is over 2 years old, we will repair and/or replace it, but you pay for the repair cost and freight.

Listed below are recommended optional components or related items. Your particular situation may require alternative recommendations. Please call and talk to our consultants if there are any questions at 800-282-6631.
Item # 121000 - In Stock
Non-rechargeable disposable batteries.
Item # 121600 - In Stock
For all 12v energizers. Durable, safe rechargeable battery.
Item # 133500 - In Stock
3 in 1 tester for fence voltage, intensity of current and fault finder. Indicates which direction a fault (leak) in your fence is located.
Item # 130800 - In Stock
For connecting a battery energizer to the fence and ground rod. Can also be used with a 110v energizer if within close proximity to the fence and ground.
Average Rating: 3 out of 5
Number of Reviews: 2 customers reviewed this product.

Write a Review

Date: December 6, 2011
Joseph F from Lifespan Lacking - Lower Output Than Advertised
Would you recommend this product? No
We had the same experience as Allan D and the "Should Power..." must be best case and we noticed it only sufficiently powered two 164 foot sections of E'Stop 9/42/6 fence. This seems to be normal for our location and we do not have any grass touching in the winter and it still only provides any sort of deterrent if using 2 sections of the above fence. We've owned 3 different models of chargers from Premier and upgrade as our needs grow and the experience is the same, take the "Should power..." fencing numbers and divide by 2 and then you'll have an accurate representation.

We've ordered two of these charges and had to have send one back to get worked on and the second died 2 1/2 years after purchase and due to shipping and the unknown repair costs was tossed. We bought Premier's most powerful DC unit and use a 12V that is refreshed from a trickle charger every few weeks.
Date: June 1, 2011
Amy D from maine
Would you recommend this product? Yes
So far I am very happy with this charger. I was able to modify it to be used with the deep cycle large batteries that I have on hand and although those do not fit inside the handy carry box, everthing is still easily transported and connected. I use 3-4 rolls of 164' sheep fencing and it works well, even with heavy vegetation load.
Date: February 6, 2010
Allan D
..........the product is fine, however...... I'm not sure why I was advised to use this charger when, at the same time, I ordered 5 rolls of fencing to go with it. The charger is NOT strong enough to provide ample shock on that much fence.. Maybe I should just shell out a few more hundred bucks and buy another..?(just money right??)